diff --git a/src/ItemCreator.cc b/src/ItemCreator.cc
index fe8faf9f..63c5000a 100644
--- a/src/ItemCreator.cc
+++ b/src/ItemCreator.cc
@@ -480,7 +480,7 @@ void ItemCreator::set_item_unidentified_flag_if_not_challenge(ItemData& item) co
 
 void ItemCreator::set_tool_item_amount_to_1(ItemData& item) const {
   if (item.data1[0] == 0x03) {
-    item.set_tool_item_amount(1);
+    item.set_tool_item_amount(this->version, 1);
   }
 }
 
@@ -1686,7 +1686,7 @@ ItemCreator::DropResult ItemCreator::on_specialized_box_item_drop(
   return res;
 }
 
-ItemData ItemCreator::base_item_for_specialized_box(uint32_t def0, uint32_t def1, uint32_t def2) {
+ItemData ItemCreator::base_item_for_specialized_box(uint32_t def0, uint32_t def1, uint32_t def2) const {
   ItemData item;
   item.data1[0] = (def0 >> 0x18) & 0x0F;
   item.data1[1] = (def0 >> 0x10) + ((item.data1[0] == 0x00) || (item.data1[0] == 0x01));
@@ -1715,7 +1715,7 @@ ItemData ItemCreator::base_item_for_specialized_box(uint32_t def0, uint32_t def1
       if (item.data1[1] == 0x02) {
         item.data1[4] = def0 & 0xFF;
       }
-      item.set_tool_item_amount(1);
+      item.set_tool_item_amount(this->version, 1);
       break;
     case 0x04:
       item.data2d = ((def1 >> 0x10) & 0xFFFF) * 10;
diff --git a/src/ItemCreator.hh b/src/ItemCreator.hh
index c8bcf6bb..e1d6c1cf 100644
--- a/src/ItemCreator.hh
+++ b/src/ItemCreator.hh
@@ -43,7 +43,7 @@ public:
   void set_monster_destroyed(uint16_t entity_id);
   void set_box_destroyed(uint16_t entity_id);
 
-  static ItemData base_item_for_specialized_box(uint32_t def0, uint32_t def1, uint32_t def2);
+  ItemData base_item_for_specialized_box(uint32_t def0, uint32_t def1, uint32_t def2) const;
 
   std::vector<ItemData> generate_armor_shop_contents(size_t player_level);
   std::vector<ItemData> generate_tool_shop_contents(size_t player_level);
diff --git a/src/ItemData.cc b/src/ItemData.cc
index 02caeea3..8edf4d74 100644
--- a/src/ItemData.cc
+++ b/src/ItemData.cc
@@ -84,7 +84,7 @@ uint32_t ItemData::primary_identifier() const {
   }
 }
 
-bool ItemData::is_wrapped() const {
+bool ItemData::is_wrapped(Version version) const {
   switch (this->data1[0]) {
     case 0:
     case 1:
@@ -92,7 +92,7 @@ bool ItemData::is_wrapped() const {
     case 2:
       return this->data2[2] & 0x40;
     case 3:
-      return !this->is_stackable() && (this->data1[3] & 0x40);
+      return !this->is_stackable(version) && (this->data1[3] & 0x40);
     case 4:
       return false;
     default:
@@ -100,7 +100,7 @@ bool ItemData::is_wrapped() const {
   }
 }
 
-void ItemData::wrap() {
+void ItemData::wrap(Version version) {
   switch (this->data1[0]) {
     case 0:
     case 1:
@@ -110,7 +110,7 @@ void ItemData::wrap() {
       this->data2[2] |= 0x40;
       break;
     case 3:
-      if (!this->is_stackable()) {
+      if (!this->is_stackable(version)) {
         this->data1[3] |= 0x40;
       }
       break;
@@ -121,7 +121,7 @@ void ItemData::wrap() {
   }
 }
 
-void ItemData::unwrap() {
+void ItemData::unwrap(Version version) {
   switch (this->data1[0]) {
     case 0:
     case 1:
@@ -131,7 +131,7 @@ void ItemData::unwrap() {
       this->data2[2] &= 0xBF;
       break;
     case 3:
-      if (!this->is_stackable()) {
+      if (!this->is_stackable(version)) {
         this->data1[3] &= 0xBF;
       }
       break;
@@ -142,23 +142,23 @@ void ItemData::unwrap() {
   }
 }
 
-bool ItemData::is_stackable() const {
-  return this->max_stack_size() > 1;
+bool ItemData::is_stackable(Version version) const {
+  return this->max_stack_size(version) > 1;
 }
 
-size_t ItemData::stack_size() const {
-  if (max_stack_size_for_item(this->data1[0], this->data1[1]) > 1) {
+size_t ItemData::stack_size(Version version) const {
+  if (max_stack_size_for_item(version, this->data1[0], this->data1[1]) > 1) {
     return this->data1[5];
   }
   return 1;
 }
 
-size_t ItemData::max_stack_size() const {
-  return max_stack_size_for_item(this->data1[0], this->data1[1]);
+size_t ItemData::max_stack_size(Version version) const {
+  return max_stack_size_for_item(version, this->data1[0], this->data1[1]);
 }
 
-void ItemData::enforce_min_stack_size() {
-  if (this->stack_size() == 0) {
+void ItemData::enforce_min_stack_size(Version version) {
+  if (this->stack_size(version) == 0) {
     this->data1[5] = 1;
   }
 }
@@ -502,12 +502,12 @@ void ItemData::set_sealed_item_kill_count(uint16_t v) {
   }
 }
 
-uint8_t ItemData::get_tool_item_amount() const {
-  return this->is_stackable() ? this->data1[5] : 1;
+uint8_t ItemData::get_tool_item_amount(Version version) const {
+  return this->is_stackable(version) ? this->data1[5] : 1;
 }
 
-void ItemData::set_tool_item_amount(uint8_t amount) {
-  if (this->is_stackable()) {
+void ItemData::set_tool_item_amount(Version version, uint8_t amount) {
+  if (this->is_stackable(version)) {
     this->data1[5] = amount;
   } else if (this->data1[0] == 0x03) {
     this->data1[5] = 0x00;
diff --git a/src/ItemData.hh b/src/ItemData.hh
index 900caaf8..002466b5 100644
--- a/src/ItemData.hh
+++ b/src/ItemData.hh
@@ -140,14 +140,14 @@ struct ItemData { // 0x14 bytes
   std::string hex() const;
   uint32_t primary_identifier() const;
 
-  bool is_wrapped() const;
-  void wrap();
-  void unwrap();
+  bool is_wrapped(Version version) const;
+  void wrap(Version version);
+  void unwrap(Version version);
 
-  bool is_stackable() const;
-  size_t stack_size() const;
-  size_t max_stack_size() const;
-  void enforce_min_stack_size();
+  bool is_stackable(Version version) const;
+  size_t stack_size(Version version) const;
+  size_t max_stack_size(Version version) const;
+  void enforce_min_stack_size(Version version);
 
   static bool is_common_consumable(uint32_t primary_identifier);
   bool is_common_consumable() const;
@@ -166,8 +166,8 @@ struct ItemData { // 0x14 bytes
 
   uint16_t get_sealed_item_kill_count() const;
   void set_sealed_item_kill_count(uint16_t v);
-  uint8_t get_tool_item_amount() const;
-  void set_tool_item_amount(uint8_t amount);
+  uint8_t get_tool_item_amount(Version version) const;
+  void set_tool_item_amount(Version version, uint8_t amount);
   int16_t get_armor_or_shield_defense_bonus() const;
   void set_armor_or_shield_defense_bonus(int16_t bonus);
   int16_t get_common_armor_evasion_bonus() const;
diff --git a/src/ItemNameIndex.cc b/src/ItemNameIndex.cc
index 54a7748e..22555cc0 100644
--- a/src/ItemNameIndex.cc
+++ b/src/ItemNameIndex.cc
@@ -21,9 +21,11 @@ using namespace std;
 // };
 
 ItemNameIndex::ItemNameIndex(
+    Version version,
     std::shared_ptr<const ItemParameterTable> item_parameter_table,
     const std::vector<std::string>& name_coll)
-    : item_parameter_table(item_parameter_table) {
+    : version(version),
+      item_parameter_table(item_parameter_table) {
 
   auto find_items_1d = [&](uint64_t data1, size_t position) -> size_t {
     ItemData item(data1, 0);
@@ -176,7 +178,7 @@ std::string ItemNameIndex::describe_item(
   // flags in a different location.
   if (((item.data1[1] == 0x01) && (item.data1[4] & 0x40)) ||
       ((item.data1[0] == 0x02) && (item.data2[2] & 0x40)) ||
-      ((item.data1[0] == 0x03) && !item.is_stackable() && (item.data1[3] & 0x40))) {
+      ((item.data1[0] == 0x03) && !item.is_stackable(this->version) && (item.data1[3] & 0x40))) {
     ret_tokens.emplace_back("Wrapped");
   }
 
@@ -359,7 +361,7 @@ std::string ItemNameIndex::describe_item(
 
     // For tools, add the amount (if applicable)
   } else if (item.data1[0] == 0x03) {
-    if (item.max_stack_size() > 1) {
+    if (item.max_stack_size(this->version) > 1) {
       ret_tokens.emplace_back(string_printf("x%hhu", item.data1[5]));
     }
   }
@@ -401,7 +403,7 @@ ItemData ItemNameIndex::parse_item_description(const std::string& desc) const {
       }
     }
   }
-  ret.enforce_min_stack_size();
+  ret.enforce_min_stack_size(this->version);
   return ret;
 }
 
@@ -635,7 +637,7 @@ ItemData ItemNameIndex::parse_item_description_phase(const std::string& descript
       ret.data2[2] |= 0x40;
     }
   } else if (ret.data1[0] == 0x03) {
-    if (ret.max_stack_size() > 1) {
+    if (ret.max_stack_size(this->version) > 1) {
       if (starts_with(desc, "x")) {
         ret.data1[5] = stoul(desc.substr(1), nullptr, 10);
       } else {
@@ -646,7 +648,7 @@ ItemData ItemNameIndex::parse_item_description_phase(const std::string& descript
     }
 
     if (is_wrapped) {
-      if (ret.is_stackable()) {
+      if (ret.is_stackable(this->version)) {
         throw runtime_error("stackable items cannot be wrapped");
       } else {
         ret.data1[3] |= 0x40;
diff --git a/src/ItemNameIndex.hh b/src/ItemNameIndex.hh
index 15cf76a9..451249d4 100644
--- a/src/ItemNameIndex.hh
+++ b/src/ItemNameIndex.hh
@@ -19,7 +19,10 @@ public:
     std::string name;
   };
 
-  ItemNameIndex(std::shared_ptr<const ItemParameterTable> pmt, const std::vector<std::string>& name_coll);
+  ItemNameIndex(
+      Version version,
+      std::shared_ptr<const ItemParameterTable> pmt,
+      const std::vector<std::string>& name_coll);
 
   inline size_t entry_count() const {
     return this->primary_identifier_index.size();
@@ -38,6 +41,7 @@ public:
 private:
   ItemData parse_item_description_phase(const std::string& description, bool skip_special) const;
 
+  Version version;
   std::shared_ptr<const ItemParameterTable> item_parameter_table;
 
   std::unordered_map<uint32_t, std::shared_ptr<const ItemMetadata>> primary_identifier_index;
diff --git a/src/Items.cc b/src/Items.cc
index f3b09bb5..572bcbc5 100644
--- a/src/Items.cc
+++ b/src/Items.cc
@@ -111,9 +111,9 @@ void player_use_item(shared_ptr<Client> c, size_t item_index, shared_ptr<PSOLFGE
     }
     armor.data.data1[5]++;
 
-  } else if (item.data.is_wrapped()) {
+  } else if (item.data.is_wrapped(c->version())) {
     // Unwrap present
-    item.data.unwrap();
+    item.data.unwrap(c->version());
     should_delete_item = false;
 
   } else if (item_identifier == 0x003300) {
@@ -250,7 +250,7 @@ void player_use_item(shared_ptr<Client> c, size_t item_index, shared_ptr<PSOLFGE
   if (should_delete_item) {
     // Allow overdrafting meseta if the client is not BB, since the server isn't
     // informed when meseta is added or removed from the bank.
-    player->remove_item(item.data.id, 1, !is_v4(c->version()));
+    player->remove_item(item.data.id, 1, c->version());
   }
 }
 
diff --git a/src/PlayerSubordinates.cc b/src/PlayerSubordinates.cc
index d57cd4a7..9f76eaed 100644
--- a/src/PlayerSubordinates.cc
+++ b/src/PlayerSubordinates.cc
@@ -450,7 +450,7 @@ PlayerRecordsBB_Challenge::operator PlayerRecordsV3_Challenge<false>() const {
   return ret;
 }
 
-void PlayerBank::add_item(const ItemData& item) {
+void PlayerBank::add_item(const ItemData& item, Version version) {
   uint32_t pid = item.primary_identifier();
 
   if (pid == MESETA_IDENTIFIER) {
@@ -461,7 +461,7 @@ void PlayerBank::add_item(const ItemData& item) {
     return;
   }
 
-  size_t combine_max = item.max_stack_size();
+  size_t combine_max = item.max_stack_size(version);
   if (combine_max > 1) {
     size_t y;
     for (y = 0; y < this->num_items; y++) {
@@ -486,17 +486,17 @@ void PlayerBank::add_item(const ItemData& item) {
   }
   auto& last_item = this->items[this->num_items];
   last_item.data = item;
-  last_item.amount = (item.max_stack_size() > 1) ? item.data1[5] : 1;
+  last_item.amount = (item.max_stack_size(version) > 1) ? item.data1[5] : 1;
   last_item.present = 1;
   this->num_items++;
 }
 
-ItemData PlayerBank::remove_item(uint32_t item_id, uint32_t amount) {
+ItemData PlayerBank::remove_item(uint32_t item_id, uint32_t amount, Version version) {
   size_t index = this->find_item(item_id);
   auto& bank_item = this->items[index];
 
   ItemData ret;
-  if (amount && (bank_item.data.stack_size() > 1) && (amount < bank_item.data.data1[5])) {
+  if (amount && (bank_item.data.stack_size(version) > 1) && (amount < bank_item.data.data1[5])) {
     ret = bank_item.data;
     ret.data1[5] = amount;
     bank_item.data.data1[5] -= amount;
diff --git a/src/PlayerSubordinates.hh b/src/PlayerSubordinates.hh
index fb8d4fd4..88224cec 100644
--- a/src/PlayerSubordinates.hh
+++ b/src/PlayerSubordinates.hh
@@ -100,8 +100,8 @@ struct PlayerBank {
   /* 0008 */ parray<PlayerBankItem, 200> items;
   /* 12C8 */
 
-  void add_item(const ItemData& item);
-  ItemData remove_item(uint32_t item_id, uint32_t amount);
+  void add_item(const ItemData& item, Version version);
+  ItemData remove_item(uint32_t item_id, uint32_t amount, Version version);
   size_t find_item(uint32_t item_id);
 
   void sort();
diff --git a/src/ReceiveCommands.cc b/src/ReceiveCommands.cc
index cc04b22f..98d0c212 100644
--- a/src/ReceiveCommands.cc
+++ b/src/ReceiveCommands.cc
@@ -3671,7 +3671,7 @@ static void on_DF_BB(shared_ptr<Client> c, uint16_t command, uint32_t, string& d
           ? p->challenge_records.ep2_online_award_state
           : p->challenge_records.ep1_online_award_state;
       award_state.rank_award_flags |= cmd.rank_bitmask;
-      p->add_item(cmd.item);
+      p->add_item(cmd.item, c->version());
       l->on_item_id_generated_externally(cmd.item.id);
       string desc = s->describe_item(Version::BB_V4, cmd.item, false);
       l->log.info("(Challenge mode) Item awarded to player %hhu: %s", c->lobby_client_id, desc.c_str());
@@ -4543,9 +4543,9 @@ static void on_D2_V3_BB(shared_ptr<Client> c, uint16_t, uint32_t, string& data)
       auto to_p = to_c->character();
       auto from_p = from_c->character();
       for (const auto& trade_item : from_c->pending_item_trade->items) {
-        size_t amount = trade_item.stack_size();
+        size_t amount = trade_item.stack_size(from_c->version());
 
-        auto item = from_p->remove_item(trade_item.id, amount, false);
+        auto item = from_p->remove_item(trade_item.id, amount, from_c->version());
         // This is a special case: when the trade is executed, the client
         // deletes the traded items from its own inventory automatically, so we
         // should NOT send the 6x29 to that client; we should only send it to
@@ -4557,7 +4557,7 @@ static void on_D2_V3_BB(shared_ptr<Client> c, uint16_t, uint32_t, string& data)
           }
         }
 
-        to_p->add_item(trade_item);
+        to_p->add_item(trade_item, to_c->version());
         send_create_inventory_item_to_lobby(to_c, to_c->lobby_client_id, item);
       }
       send_command(to_c, 0xD3, 0x00);
@@ -4991,7 +4991,7 @@ static void on_EA_BB(shared_ptr<Client> c, uint16_t command, uint32_t flag, stri
           }
         }
         if (!reward.reward_item.empty()) {
-          c->current_bank().add_item(reward.reward_item);
+          c->current_bank().add_item(reward.reward_item, c->version());
         }
       }
       break;
diff --git a/src/ReceiveSubcommands.cc b/src/ReceiveSubcommands.cc
index 401b88a2..cea872f7 100644
--- a/src/ReceiveSubcommands.cc
+++ b/src/ReceiveSubcommands.cc
@@ -1376,7 +1376,7 @@ static void on_player_drop_item(shared_ptr<Client> c, uint8_t command, uint8_t f
 
   auto l = c->require_lobby();
   auto p = c->character();
-  auto item = p->remove_item(cmd.item_id, 0, c->version() != Version::BB_V4);
+  auto item = p->remove_item(cmd.item_id, 0, c->version());
   l->add_item(cmd.floor, item, cmd.x, cmd.z, 0x00F);
 
   if (l->log.should_log(LogLevel::INFO)) {
@@ -1438,7 +1438,7 @@ static void on_create_inventory_item_t(shared_ptr<Client> c, uint8_t command, ui
   ItemData item = cmd.item_data;
   item.decode_for_version(c->version());
   l->on_item_id_generated_externally(item.id);
-  p->add_item(item);
+  p->add_item(item, c->version());
 
   if (l->log.should_log(LogLevel::INFO)) {
     auto s = c->require_server_state();
@@ -1511,7 +1511,7 @@ static void on_drop_partial_stack_bb(shared_ptr<Client> c, uint8_t command, uint
     }
 
     auto p = c->character();
-    auto item = p->remove_item(cmd.item_id, cmd.amount, c->version() != Version::BB_V4);
+    auto item = p->remove_item(cmd.item_id, cmd.amount, c->version());
 
     // If a stack was split, the original item still exists, so the dropped item
     // needs a new ID. remove_item signals this by returning an item with an ID
@@ -1523,7 +1523,7 @@ static void on_drop_partial_stack_bb(shared_ptr<Client> c, uint8_t command, uint
     // PSOBB sends a 6x29 command after it receives the 6x5D, so we need to add
     // the item back to the player's inventory to correct for this (it will get
     // removed again by the 6x29 handler)
-    p->add_item(item);
+    p->add_item(item, c->version());
 
     l->add_item(cmd.floor, item, cmd.x, cmd.z, 0x00F);
     send_drop_stacked_item_to_lobby(l, item, cmd.floor, cmd.x, cmd.z);
@@ -1558,7 +1558,7 @@ static void on_buy_shop_item(shared_ptr<Client> c, uint8_t command, uint8_t flag
   item.data2d = 0; // Clear the price field
   item.decode_for_version(c->version());
   l->on_item_id_generated_externally(item.id);
-  p->add_item(item);
+  p->add_item(item, c->version());
 
   size_t price = s->item_parameter_table(c->version())->price_for_item(item);
   p->remove_meseta(price, c->version() != Version::BB_V4);
@@ -1674,7 +1674,7 @@ static void on_pick_up_item_generic(
     }
 
     try {
-      p->add_item(fi->data);
+      p->add_item(fi->data, c->version());
     } catch (const out_of_range&) {
       // Inventory is full; put the item back where it was
       l->log.warning("Player %hu requests to pick up %08" PRIX32 ", but their inventory is full; dropping command",
@@ -1811,8 +1811,8 @@ static void on_feed_mag(
   // a 6x29 immediately after to destroy the fed item. So on BB, we should
   // remove the fed item here, but on other versions, we allow the following
   // 6x29 command to do that.
-  if (l->base_version == Version::BB_V4) {
-    p->remove_item(cmd.fed_item_id, 1, false);
+  if (c->version() == Version::BB_V4) {
+    p->remove_item(cmd.fed_item_id, 1, c->version());
   }
 
   if (l->log.should_log(LogLevel::INFO)) {
@@ -1899,7 +1899,7 @@ static void on_ep3_private_word_select_bb_bank_action(shared_ptr<Client> c, uint
         }
 
       } else { // Deposit item
-        auto item = p->remove_item(cmd.item_id, cmd.item_amount, c->version() != Version::BB_V4);
+        auto item = p->remove_item(cmd.item_id, cmd.item_amount, c->version());
         // If a stack was split, the bank item retains the same item ID as the
         // inventory item. This is annoying but doesn't cause any problems
         // because we always generate a new item ID when withdrawing from the
@@ -1907,7 +1907,7 @@ static void on_ep3_private_word_select_bb_bank_action(shared_ptr<Client> c, uint
         if (item.id == 0xFFFFFFFF) {
           item.id = cmd.item_id;
         }
-        bank.add_item(item);
+        bank.add_item(item, c->version());
         send_destroy_item_to_lobby(c, cmd.item_id, cmd.item_amount, true);
 
         if (l->log.should_log(LogLevel::INFO)) {
@@ -1934,9 +1934,9 @@ static void on_ep3_private_word_select_bb_bank_action(shared_ptr<Client> c, uint
         }
 
       } else { // Take item
-        auto item = bank.remove_item(cmd.item_id, cmd.item_amount);
+        auto item = bank.remove_item(cmd.item_id, cmd.item_amount, c->version());
         item.id = l->generate_item_id(c->lobby_client_id);
-        p->add_item(item);
+        p->add_item(item, c->version());
         send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
 
         if (l->log.should_log(LogLevel::INFO)) {
@@ -2659,7 +2659,7 @@ void on_adjust_player_meseta_bb(shared_ptr<Client> c, uint8_t, uint8_t, void* da
     item.data1[0] = 0x04;
     item.data2d = cmd.amount.load();
     item.id = l->generate_item_id(c->lobby_client_id);
-    p->add_item(item);
+    p->add_item(item, c->version());
     send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
   }
 }
@@ -2670,9 +2670,9 @@ void on_item_reward_request_bb(shared_ptr<Client> c, uint8_t, uint8_t, void* dat
 
   ItemData item;
   item = cmd.item_data;
-  item.enforce_min_stack_size();
+  item.enforce_min_stack_size(c->version());
   item.id = l->generate_item_id(c->lobby_client_id);
-  c->character()->add_item(item);
+  c->character()->add_item(item, c->version());
   send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
 }
 
@@ -2699,7 +2699,7 @@ void on_transfer_item_via_mail_message_bb(shared_ptr<Client> c, uint8_t command,
 
   auto s = c->require_server_state();
   auto p = c->character();
-  auto item = p->remove_item(cmd.item_id, cmd.amount, c->version() != Version::BB_V4);
+  auto item = p->remove_item(cmd.item_id, cmd.amount, c->version());
 
   if (l->log.should_log(LogLevel::INFO)) {
     auto name = s->describe_item(c->version(), item, false);
@@ -2718,7 +2718,7 @@ void on_transfer_item_via_mail_message_bb(shared_ptr<Client> c, uint8_t command,
       (target_c->character(false) != nullptr) &&
       !target_c->config.check_flag(Client::Flag::AT_BANK_COUNTER)) {
     try {
-      target_c->current_bank().add_item(item);
+      target_c->current_bank().add_item(item, target_c->version());
       item_sent = true;
     } catch (const runtime_error&) {
     }
@@ -2730,7 +2730,7 @@ void on_transfer_item_via_mail_message_bb(shared_ptr<Client> c, uint8_t command,
     send_command(c, 0x16EA, 0x00000000);
     // If the item failed to send, add it back to the sender's inventory
     item.id = l->generate_item_id(0xFF);
-    p->add_item(item);
+    p->add_item(item, c->version());
     send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
   }
 }
@@ -2756,7 +2756,7 @@ void on_exchange_item_for_team_points_bb(shared_ptr<Client> c, uint8_t command,
 
   auto s = c->require_server_state();
   auto p = c->character();
-  auto item = p->remove_item(cmd.item_id, cmd.amount, c->version() != Version::BB_V4);
+  auto item = p->remove_item(cmd.item_id, cmd.amount, c->version());
 
   size_t points = s->item_parameter_table_v4->get_item_team_points(item);
   s->team_index->add_member_points(c->license->serial_number, points);
@@ -2784,7 +2784,7 @@ static void on_destroy_inventory_item(shared_ptr<Client> c, uint8_t command, uin
 
   auto s = c->require_server_state();
   auto p = c->character();
-  auto item = p->remove_item(cmd.item_id, cmd.amount, c->version() != Version::BB_V4);
+  auto item = p->remove_item(cmd.item_id, cmd.amount, c->version());
 
   if (l->log.should_log(LogLevel::INFO)) {
     auto name = s->describe_item(c->version(), item, false);
@@ -2876,7 +2876,7 @@ static void on_accept_identify_item_bb(shared_ptr<Client> c, uint8_t command, ui
     if (c->bb_identify_result.id != cmd.item_id) {
       throw runtime_error("accepted item ID does not match previous identify request");
     }
-    c->character()->add_item(c->bb_identify_result);
+    c->character()->add_item(c->bb_identify_result, c->version());
     send_create_inventory_item_to_lobby(c, c->lobby_client_id, c->bb_identify_result);
     c->bb_identify_result.clear();
 
@@ -2893,7 +2893,7 @@ static void on_sell_item_at_shop_bb(shared_ptr<Client> c, uint8_t command, uint8
 
     auto s = c->require_server_state();
     auto p = c->character();
-    auto item = p->remove_item(cmd.item_id, cmd.amount, c->version() != Version::BB_V4);
+    auto item = p->remove_item(cmd.item_id, cmd.amount, c->version());
     size_t price = (s->item_parameter_table(c->version())->price_for_item(item) >> 3) * cmd.amount;
     p->add_meseta(price);
 
@@ -2915,7 +2915,7 @@ static void on_buy_shop_item_bb(shared_ptr<Client> c, uint8_t, uint8_t, void* da
 
     ItemData item;
     item = c->bb_shop_contents.at(cmd.shop_type).at(cmd.item_index);
-    if (item.is_stackable()) {
+    if (item.is_stackable(c->version())) {
       item.data1[5] = cmd.amount;
     } else if (cmd.amount != 1) {
       throw runtime_error("item is not stackable");
@@ -2928,7 +2928,7 @@ static void on_buy_shop_item_bb(shared_ptr<Client> c, uint8_t, uint8_t, void* da
 
     item.id = cmd.shop_item_id;
     l->on_item_id_generated_externally(item.id);
-    p->add_item(item);
+    p->add_item(item, c->version());
     send_create_inventory_item_to_lobby(c, c->lobby_client_id, item, true);
 
     if (l->log.should_log(LogLevel::INFO)) {
@@ -3031,15 +3031,15 @@ static void on_quest_exchange_item_bb(shared_ptr<Client> c, uint8_t, uint8_t, vo
       auto p = c->character();
 
       size_t found_index = p->inventory.find_item_by_primary_identifier(cmd.find_item.primary_identifier());
-      auto found_item = p->remove_item(p->inventory.items[found_index].data.id, 1, false);
+      auto found_item = p->remove_item(p->inventory.items[found_index].data.id, 1, c->version());
       send_destroy_item_to_lobby(c, found_item.id, 1);
 
       // TODO: We probably should use an allow-list here to prevent the client
       // from creating arbitrary items if cheat mode is disabled.
       ItemData new_item = cmd.replace_item;
-      new_item.enforce_min_stack_size();
+      new_item.enforce_min_stack_size(c->version());
       new_item.id = l->generate_item_id(c->lobby_client_id);
-      p->add_item(new_item);
+      p->add_item(new_item, c->version());
       send_create_inventory_item_to_lobby(c, c->lobby_client_id, new_item);
 
       send_quest_function_call(c, cmd.success_function_id);
@@ -3057,10 +3057,10 @@ static void on_wrap_item_bb(shared_ptr<Client> c, uint8_t, uint8_t, void* data,
     const auto& cmd = check_size_t<G_WrapItem_BB_6xD6>(data, size);
 
     auto p = c->character();
-    auto item = p->remove_item(cmd.item.id, 1, false);
+    auto item = p->remove_item(cmd.item.id, 1, c->version());
     send_destroy_item_to_lobby(c, item.id, 1);
-    item.wrap();
-    p->add_item(item);
+    item.wrap(c->version());
+    p->add_item(item, c->version());
     send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
   }
 }
@@ -3074,15 +3074,15 @@ static void on_photon_drop_exchange_for_item_bb(shared_ptr<Client> c, uint8_t, u
       auto p = c->character();
 
       size_t found_index = p->inventory.find_item_by_primary_identifier(0x031000);
-      auto found_item = p->remove_item(p->inventory.items[found_index].data.id, 0, false);
-      send_destroy_item_to_lobby(c, found_item.id, found_item.stack_size());
+      auto found_item = p->remove_item(p->inventory.items[found_index].data.id, 0, c->version());
+      send_destroy_item_to_lobby(c, found_item.id, found_item.stack_size(c->version()));
 
       // TODO: We probably should use an allow-list here to prevent the client
       // from creating arbitrary items if cheat mode is disabled.
       ItemData new_item = cmd.new_item;
-      new_item.enforce_min_stack_size();
+      new_item.enforce_min_stack_size(c->version());
       new_item.id = l->generate_item_id(c->lobby_client_id);
-      p->add_item(new_item);
+      p->add_item(new_item, c->version());
       send_create_inventory_item_to_lobby(c, c->lobby_client_id, new_item);
 
       send_quest_function_call(c, cmd.success_function_id);
@@ -3110,13 +3110,13 @@ static void on_photon_drop_exchange_for_s_rank_special_bb(shared_ptr<Client> c,
       // consistent in case of error
       p->inventory.find_item(cmd.item_id);
 
-      auto payment_item = p->remove_item(p->inventory.items[payment_item_index].data.id, cost, false);
+      auto payment_item = p->remove_item(p->inventory.items[payment_item_index].data.id, cost, c->version());
       send_destroy_item_to_lobby(c, payment_item.id, cost);
 
-      auto item = p->remove_item(cmd.item_id, 1, false);
+      auto item = p->remove_item(cmd.item_id, 1, c->version());
       send_destroy_item_to_lobby(c, item.id, cost);
       item.data1[2] = cmd.special_type;
-      p->add_item(item);
+      p->add_item(item, c->version());
       send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
 
       send_quest_function_call(c, cmd.success_function_id);
@@ -3157,14 +3157,14 @@ static void on_secret_lottery_ticket_exchange_bb(shared_ptr<Client> c, uint8_t,
       exchange_cmd.amount = 1;
       send_command_t(c, 0x60, 0x00, exchange_cmd);
 
-      send_destroy_item_to_lobby(c, slt_item_id, 1);
+      p->remove_item(slt_item_id, 1, c->version());
 
       ItemData item = (s->secret_lottery_results.size() == 1)
           ? s->secret_lottery_results[0]
           : s->secret_lottery_results[l->random_crypt->next() % s->secret_lottery_results.size()];
-      item.enforce_min_stack_size();
+      item.enforce_min_stack_size(c->version());
       item.id = l->generate_item_id(c->lobby_client_id);
-      p->add_item(item);
+      p->add_item(item, c->version());
       send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
     }
 
@@ -3190,7 +3190,7 @@ static void on_photon_crystal_exchange_bb(shared_ptr<Client> c, uint8_t, uint8_t
     check_size_t<G_ExchangePhotonCrystals_BB_6xDF>(data, size);
     auto p = c->character();
     size_t index = p->inventory.find_item_by_primary_identifier(0x031002);
-    auto item = p->remove_item(p->inventory.items[index].data.id, 1, false);
+    auto item = p->remove_item(p->inventory.items[index].data.id, 1, c->version());
     send_destroy_item_to_lobby(c, item.id, 1);
   }
 }
@@ -3216,7 +3216,7 @@ static void on_quest_F95E_result_bb(shared_ptr<Client> c, uint8_t, uint8_t, void
       } else if (item.data1[0] == 0x00) {
         item.data1[4] |= 0x80; // Unidentified
       } else {
-        item.enforce_min_stack_size();
+        item.enforce_min_stack_size(c->version());
       }
 
       item.id = l->generate_item_id(0xFF);
@@ -3240,7 +3240,7 @@ static void on_quest_F95F_result_bb(shared_ptr<Client> c, uint8_t, uint8_t, void
     }
 
     size_t index = p->inventory.find_item_by_primary_identifier(0x031004); // Photon Ticket
-    auto ticket_item = p->remove_item(p->inventory.items[index].data.id, result.first, false);
+    auto ticket_item = p->remove_item(p->inventory.items[index].data.id, result.first, c->version());
     // TODO: Shouldn't we send a 6x29 here? Check if this causes desync in an
     // actual game
 
@@ -3252,9 +3252,9 @@ static void on_quest_F95F_result_bb(shared_ptr<Client> c, uint8_t, uint8_t, void
     send_command_t(c, 0x60, 0x00, cmd_6xDB);
 
     ItemData new_item = result.second;
-    new_item.enforce_min_stack_size();
+    new_item.enforce_min_stack_size(c->version());
     new_item.id = l->generate_item_id(c->lobby_client_id);
-    p->add_item(new_item);
+    p->add_item(new_item, c->version());
     send_create_inventory_item_to_lobby(c, c->lobby_client_id, new_item);
 
     S_GallonPlanResult_BB_25 out_cmd;
@@ -3318,7 +3318,7 @@ static void on_quest_F960_result_bb(shared_ptr<Client> c, uint8_t, uint8_t, void
     send_command_t(c, 0x60, 0x00, cmd_6xE3);
 
     try {
-      p->add_item(item);
+      p->add_item(item, c->version());
       send_create_inventory_item_to_lobby(c, c->lobby_client_id, item);
       if (c->log.should_log(LogLevel::INFO)) {
         string name = s->describe_item(c->version(), item, false);
@@ -3340,7 +3340,7 @@ static void on_momoka_item_exchange_bb(shared_ptr<Client> c, uint8_t, uint8_t, v
     auto p = c->character();
     try {
       size_t found_index = p->inventory.find_item_by_primary_identifier(cmd.find_item.primary_identifier());
-      auto found_item = p->remove_item(p->inventory.items[found_index].data.id, 1, false);
+      auto found_item = p->remove_item(p->inventory.items[found_index].data.id, 1, c->version());
 
       G_ExchangeItemInQuest_BB_6xDB cmd_6xDB = {{0xDB, 0x04, c->lobby_client_id}, 1, found_item.id, 1};
       send_command_t(c, 0x60, 0x00, cmd_6xDB);
@@ -3350,9 +3350,9 @@ static void on_momoka_item_exchange_bb(shared_ptr<Client> c, uint8_t, uint8_t, v
       // TODO: We probably should use an allow-list here to prevent the client
       // from creating arbitrary items if cheat mode is disabled.
       ItemData new_item = cmd.replace_item;
-      new_item.enforce_min_stack_size();
+      new_item.enforce_min_stack_size(c->version());
       new_item.id = l->generate_item_id(c->lobby_client_id);
-      p->add_item(new_item);
+      p->add_item(new_item, c->version());
       send_create_inventory_item_to_lobby(c, c->lobby_client_id, new_item);
 
       send_command(c, 0x23, 0x00);
@@ -3375,10 +3375,10 @@ static void on_upgrade_weapon_attribute_bb(shared_ptr<Client> c, uint8_t, uint8_
       uint32_t payment_primary_identifier = cmd.payment_type ? 0x031001 : 0x031000;
       size_t payment_index = p->inventory.find_item_by_primary_identifier(payment_primary_identifier);
       auto& payment_item = p->inventory.items[payment_index].data;
-      if (payment_item.stack_size() < cmd.payment_count) {
+      if (payment_item.stack_size(c->version()) < cmd.payment_count) {
         throw runtime_error("not enough payment items present");
       }
-      p->remove_item(payment_item.id, cmd.payment_count, false);
+      p->remove_item(payment_item.id, cmd.payment_count, c->version());
       send_destroy_item_to_lobby(c, payment_item.id, cmd.payment_count);
 
       uint8_t attribute_amount = 0;
diff --git a/src/SaveFileFormats.cc b/src/SaveFileFormats.cc
index f48abc40..13f66485 100644
--- a/src/SaveFileFormats.cc
+++ b/src/SaveFileFormats.cc
@@ -396,7 +396,7 @@ PSOBBCharacterFile::SymbolChatEntry PSOBBCharacterFile::DefaultSymbolChatEntry::
 
 // TODO: Eliminate duplication between this function and the parallel function
 // in PlayerBank
-void PSOBBCharacterFile::add_item(const ItemData& item) {
+void PSOBBCharacterFile::add_item(const ItemData& item, Version version) {
   uint32_t pid = item.primary_identifier();
 
   // Annoyingly, meseta is in the disp data, not in the inventory struct. If the
@@ -407,7 +407,7 @@ void PSOBBCharacterFile::add_item(const ItemData& item) {
   }
 
   // Handle combinable items
-  size_t combine_max = item.max_stack_size();
+  size_t combine_max = item.max_stack_size(version);
   if (combine_max > 1) {
     // Get the item index if there's already a stack of the same item in the
     // player's inventory
@@ -444,13 +444,13 @@ void PSOBBCharacterFile::add_item(const ItemData& item) {
 
 // TODO: Eliminate code duplication between this function and the parallel
 // function in PlayerBank
-ItemData PSOBBCharacterFile::remove_item(uint32_t item_id, uint32_t amount, bool allow_meseta_overdraft) {
+ItemData PSOBBCharacterFile::remove_item(uint32_t item_id, uint32_t amount, Version version) {
   ItemData ret;
 
   // If we're removing meseta (signaled by an invalid item ID), then create a
   // meseta item.
   if (item_id == 0xFFFFFFFF) {
-    this->remove_meseta(amount, allow_meseta_overdraft);
+    this->remove_meseta(amount, !is_v4(version));
     ret.data1[0] = 0x04;
     ret.data2d = amount;
     return ret;
@@ -464,7 +464,7 @@ ItemData PSOBBCharacterFile::remove_item(uint32_t item_id, uint32_t amount, bool
   // then create a new item and reduce the amount of the existing stack. Note
   // that passing amount == 0 means to remove the entire stack, so this only
   // applies if amount is nonzero.
-  if (amount && (inventory_item.data.stack_size() > 1) &&
+  if (amount && (inventory_item.data.stack_size(version) > 1) &&
       (amount < inventory_item.data.data1[5])) {
     if (is_equipped) {
       throw runtime_error("character has a combine item equipped");
diff --git a/src/SaveFileFormats.hh b/src/SaveFileFormats.hh
index 17eaea2a..b36bcee5 100644
--- a/src/SaveFileFormats.hh
+++ b/src/SaveFileFormats.hh
@@ -231,8 +231,8 @@ struct PSOBBCharacterFile {
       const PlayerDispDataBBPreview& preview,
       std::shared_ptr<const LevelTable> level_table);
 
-  void add_item(const ItemData& item);
-  ItemData remove_item(uint32_t item_id, uint32_t amount, bool allow_meseta_overdraft);
+  void add_item(const ItemData& item, Version version);
+  ItemData remove_item(uint32_t item_id, uint32_t amount, Version version);
   void add_meseta(uint32_t amount);
   void remove_meseta(uint32_t amount, bool allow_overdraft);
 
diff --git a/src/ServerState.cc b/src/ServerState.cc
index f04bdfaf..c3df9d93 100644
--- a/src/ServerState.cc
+++ b/src/ServerState.cc
@@ -1146,25 +1146,25 @@ shared_ptr<ItemNameIndex> ServerState::create_item_name_index_for_version(
     Version version, shared_ptr<const ItemParameterTable> pmt, shared_ptr<const TextIndex> text_index) {
   switch (version) {
     case Version::DC_NTE:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::DC_NTE, 0, 2));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::DC_NTE, 0, 2));
     case Version::DC_V1_11_2000_PROTOTYPE:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::DC_V1_11_2000_PROTOTYPE, 1, 2));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::DC_V1_11_2000_PROTOTYPE, 1, 2));
     case Version::DC_V1:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::DC_V1, 1, 2));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::DC_V1, 1, 2));
     case Version::DC_V2:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::DC_V2, 1, 3));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::DC_V2, 1, 3));
     case Version::PC_NTE:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::PC_NTE, 1, 3));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::PC_NTE, 1, 3));
     case Version::PC_V2:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::PC_V2, 1, 3));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::PC_V2, 1, 3));
     case Version::GC_NTE:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::GC_NTE, 1, 0));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::GC_NTE, 1, 0));
     case Version::GC_V3:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::GC_V3, 1, 0));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::GC_V3, 1, 0));
     case Version::XB_V3:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::XB_V3, 1, 0));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::XB_V3, 1, 0));
     case Version::BB_V4:
-      return make_shared<ItemNameIndex>(pmt, text_index->get(Version::BB_V4, 1, 1));
+      return make_shared<ItemNameIndex>(version, pmt, text_index->get(Version::BB_V4, 1, 1));
     default:
       return nullptr;
   }
@@ -1180,12 +1180,19 @@ void ServerState::load_item_name_indexes() {
   auto pc_v2_index = create_item_name_index_for_version(
       Version::PC_V2, this->item_parameter_table(Version::PC_V2), this->text_index);
   this->set_item_name_index(Version::DC_NTE, pc_v2_index);
-  this->set_item_name_index(Version::DC_V1_11_2000_PROTOTYPE, pc_v2_index);
   this->set_item_name_index(Version::DC_V1, pc_v2_index);
   this->set_item_name_index(Version::DC_V2, pc_v2_index);
   this->set_item_name_index(Version::PC_NTE, pc_v2_index);
   this->set_item_name_index(Version::PC_V2, pc_v2_index);
 
+  // All tools are stackable on 11/2000, so make a separate index (still using
+  // V2 data) with the correct version
+  auto dc_112000_index = make_shared<ItemNameIndex>(
+      Version::DC_V1_11_2000_PROTOTYPE,
+      this->item_parameter_table(Version::PC_V2),
+      this->text_index->get(Version::PC_V2, 1, 3));
+  this->set_item_name_index(Version::DC_V1_11_2000_PROTOTYPE, dc_112000_index);
+
   auto gc_v3_index = create_item_name_index_for_version(
       Version::GC_V3, this->item_parameter_table(Version::GC_V3), this->text_index);
   this->set_item_name_index(Version::GC_NTE, gc_v3_index);
diff --git a/src/StaticGameData.cc b/src/StaticGameData.cc
index e0895e2e..c7047d48 100644
--- a/src/StaticGameData.cc
+++ b/src/StaticGameData.cc
@@ -493,12 +493,15 @@ uint8_t language_code_for_char(char language_char) {
   }
 }
 
-size_t max_stack_size_for_item(uint8_t data0, uint8_t data1) {
+size_t max_stack_size_for_item(Version version, uint8_t data0, uint8_t data1) {
   if (data0 == 4) {
     return 999999;
   }
   if (data0 == 3) {
-    if ((data1 < 9) && (data1 != 2)) {
+    if (version == Version::DC_V1_11_2000_PROTOTYPE) {
+      // All tool items are stackable up to x10 on this version
+      return 10;
+    } else if ((data1 < 9) && (data1 != 2)) {
       return 10;
     } else if (data1 == 0x10) {
       return 99;
diff --git a/src/StaticGameData.hh b/src/StaticGameData.hh
index 87861eaf..dfcfbdad 100644
--- a/src/StaticGameData.hh
+++ b/src/StaticGameData.hh
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "FileContentsCache.hh"
+#include "Version.hh"
 
 enum class Episode {
   NONE = 0,
@@ -32,7 +33,7 @@ enum class GameMode {
 const char* name_for_mode(GameMode mode);
 const char* abbreviation_for_mode(GameMode mode);
 
-size_t max_stack_size_for_item(uint8_t data0, uint8_t data1);
+size_t max_stack_size_for_item(Version version, uint8_t data0, uint8_t data1);
 
 extern const std::vector<std::string> tech_id_to_name;
 extern const std::unordered_map<std::string, uint8_t> name_to_tech_id;