| Mouse | Location(s) | Notes/Requirements |
| Acolyte | Acolyte Realm | Requires Runic Cheese. Forgotten-type weapon recommended. |
| Aether | Crystal Library | Quite rare. More attracted to Super Brie. |
| Assassin | Dojo | Rare. Strong Tactical-type weapon recommended. |
| Balack the Banished | Balack's Cove | Requires Vengeful Vanilla Stilton. Forgotten-type weapon recommended. |
| Big Bad Burroughs | Town of Digby | Requires Limelight Cheese. Strong Physical, Tactical, or Arcane trap recommended. |
| Black Widow | Many locations; check effectiveness link | Extremely rare. Super Brie helps, but can still take a while. Alternatively, try the Lagoon with Gnarled or Wicked Gnarly cheese. |
| Chess Master | Zugzwang's Tower | Requires Checkmate cheese. See the Zugzwang's Tower chapter for details. |
| Chrono | Acolyte Realm | Requires Runic Cheese. Forgotten-type weapon recommended. |
| Cook | S.S. Huntington III | Extremely rare unless using Super Brie. |
| Deep | Iceberg | See the Iceberg chapter for details. |
| Dojo Sensei | Pinnacle Chamber | Requires Onyx Gorgonzola. Strong Tactical-type weapon recommended. |
| Dragon | Dracano | Requires Inferno Havarti. Draconic-type weapon required. |
| Eclipse | King's Gauntlet | Requires Tier 8 cheese. Forgotten-type weapon recommended. |
| Icewing | Iceberg | See the Iceberg chapter for details. |
| Fall Familiar | Seasonal Garden | Fall season. Shadow-type weapon recommended. Extremely rare unless using Super Brie. |
| Gargantuamouse | Fiery Warpath | Requires streak of 7+. Draconic-type weapon recommended. |
| General Drheller | Iceberg | "General" mouse. See the Iceberg chapter for details. |
| Mole Mouse | Meadow, Town of Digby, Windmill | Rare. Windmill is most reliable. Not attracted to Limelight. |
| Necromancer | King's Gauntlet | Requires Tier 7 cheese. Hydro-type weapon recommended. |
| Nibbler | Bazaar, Cape Clawed, Great Gnarled Tree, King's Arms, S.S. Huntington III, Town of Gnawnia, Town of Digby, Training Grounds, Tournament Hall | Extremely rare unless using Super Brie. |
| Nugget | Town of Digby | Quite rare. Requires Limelight Cheese. |
| Realm Ripper | Forbidden Grove | Ancient cheese required. Appears during closing time. Catching it sends you to the Acolyte Realm. Arcane-type weapon recommeded. |
| Reaper | Forbidden Grove | Ancient cheese required. Arcane-type weapon recommeded. |
| Shelder | S.S. Huntington III | Extremely rare. Super Brie helps, but expect to use a lot. |
| Silth | Lagoon | Wicked Gnarly cheese required. Hydro-type weapon recommended. |
| Warmonger | Fiery Warpath | See Fiery Warpath chapter for details. |
| Winter Mage | Seasonal Garden | Winter season. Hydro-type weapon recommended. |
| Zurreal the Eternal | Crystal Library | Requires Zurreal's Folly and Scholar Charm. See Crystal Library chapter for details. |
After the update, no mouse drops the Ancient Relic with a 100% rate anymore.