| Id | Name | Description |
|---|---|---|
| 0 | Treasure Room | Used inside Treasure Rooms. |
| 1 | Shop | Used inside Shops. |
| 2 | Boss | Used for the items that spawn after killing a boss in a Boss Room. |
| 3 | Devil Room | Used inside Devil Deals. |
| 4 | Angel Room | Used inside Angel Rooms. |
| 5 | Secret Room | Used inside Secret Rooms. |
| 6 | Library | Used inside Libraries. |
| 7 | Shell Game | Despite its name, this item pool is currently not used by Shell Game and is only internally used by Bag of Crafting. |
| 8 | Golden Chest | Items in this item pool are spawned from Locked Chests. |
| 9 | Red Chest | Items in this item pool are spawned from Red Chests. |
| 10 | Beggar | Items in this item pool are spawned from Beggars. |
| 11 | Demon Beggar | Items in this item pool are spawned from Devil Beggars. |
| 12 | Curse Room | Used inside Curse Rooms. |
| 13 | Key Master | Items in this item pool are spawned from Key Masters. |
| 14 | Battery Bum | Items in this item pool are spawned from Battery Bums. |
| 15 | Mom's Chest | Items in this item pool are spawned from Mom's Chest in her room on the Home floor. |
| 16 | Greed Treasure Room | Used inside the Greed Mode Treasure Room. |
| 17 | Greed Boss Room | Used inside the Greed Mode White Treasure Room. |
| 18 | Greed Shop | Used inside the Greed Mode Shop. |
| 19 | Greed Curse Room | Used inside the Greed Mode Curse Room. |
| 20 | Greed Devil Room | Used inside the Greed Mode Devil Deal. |
| 21 | Greed Angel Room | Used inside the Greed Mode Angel Room. |
| 22 | Greed Secret Room | Used inside the Greed Mode Secret Room. |
| 23 | Crane Game | Items in this item pool are spawned from the Crane Game. |
| 24 | Ultra Secret Room | Used inside Ultra Secret Rooms. |
| 25 | Bomb Bum | Items in this item pool are spawned from Bomb Bums. |
| 26 | Planetarium | Used inside Planetariums. |
| 27 | Old Chest | Items in this item pool are spawned from Old Chests. |
| 28 | Baby Shop | Used inside Shops when Adoption Papers is held. |
| 29 | Wooden Chest | Items in this item pool are spawned from Wooden Chests. |
| 30 | Rotten Beggar | Items in this item pool are spawned from Rotten Beggars. |
| Mod | Vault Turnover | Items in this pool can be found for sale when Turnover is used in a Vault. |
| Mod | Dice Room Turnover | Items in this pool can be found for sale when Turnover is used in a Dice Room. |
| Mod | Bedroom Turnover | Items in this pool can be found for sale when Turnover is used in a Bedroom. |
| Mod | Sacrifice Room Turnover | Items in this pool can be found for sale when Turnover is used in a Sacrifice Room. |
| Mod | Converter Beggar | Items in this pool are spawned by a Converter Beggar. |
| Mod | Pain-O-Matic Machine | Items in this pool are spawned when a Pain-O-Matic breaks. |
| Mod | Glitched Slot | Items in this pool are spawned when a Glitch Slot breaks. |
| Mod | Glitched Pocket | Items in this pool can be spawned as a consumable version from a Glitch Slot. |
| Mod | Dusty Chest | Items in this pool are spawned from Dusty Chests. |
| Mod | Soiled Keeper | Items in this pool are spawned from Soiled Keepers. |
| Mod | Dimensional Key | Items in this pool are spawned in the special Dimensional Key Shop.. |