Access to:
South: Castelia Sewers
East: Pokémon World Tournament
Northeast: Relic Castle
Utility:
Strength is required to access a Rock Gem, an Ultra Ball, a Rare Candy, and a Rocky Helmet.
Surf is required to access a Big Pearl. Wild Pokémon can also be encountered here with Surf.
Funfest Missions:
Castelia side: Cave map with 19 spots. 15 spots are inaccessible when entering from Castelia Sewers. Funfest Trainers: ±2 levels.
Central area: Cave map with 20 spots. One spot is in an enclosed room that requires going to the Castelia side and back. Funfest Trainers: ±3 levels.
Driftveil/PWT side: Cave map with 19 spots. Funfest Trainers: ±3 levels.
Funfest Trainer levels are lowered by the listed amount in Easy Mode and raised by it in Challenge Mode.
| Item | Location | Notes |
|---|---|---|
| Escape Rope | North of the male Scientist | |
| Escape Rope | South of the female Scientist | Hidden. |
| Hard Stone | West of the Scientists | |
| Max Repel | In the western area, near the ledges |
| Item | Location | Notes |
|---|---|---|
| Protein | Near Backpacker Randall | |
| Green Shard | On a rock near Psychic Tully | Hidden. |
| Blue Shard | On a rock southwest of Hiker Tobias | Hidden. |
| Max Repel | In a dead end south of Hiker Tobias | Hidden. |
| Red Shard | On a rock near Psychic Ena | Hidden. |
| Yellow Shard | In a rock near Backpacker Annie | Hidden. |
| Rock Gem | In a room accessible from the southern entrance | Hidden. Requires Strength. |
| Ultra Ball | In a room accessible from the southern entrance | Requires Strength. |
| Rare Candy | In a room accessible from the southern entrance | Requires Strength. |
| Rocky Helmet | In a room accessible from the southern entrance | Requires Strength. |
| Big Pearl | West of Hiker Tobias | Requires Surf. |
The following items can be found by stepping in a dust cloud.
| Red Shard | Blue Shard | Yellow Shard | Green Shard |
| Trainer | Party | Notes |
|---|---|---|
| Scientist Terrance | Grimer lv. 16 (Easy Mode) / 18 (Normal Mode) / 20 (Challenge Mode) | In the Castelia Sewers side. |
| Scientist Lumina | Venipede lv. 15 (Easy Mode) / 17 (Normal Mode) / 19 (Challenge Mode) Koffing lv. 15 (Easy Mode) / 17 (Normal Mode) / 19 (Challenge Mode) |
In the Castelia Sewers side. |
| Backpacker Kendall | Herdier lv. 16 (Easy Mode) / 18 (Normal Mode) / 20 (Challenge Mode) | In the Castelia Sewers side. |
| Backpacker Eileen | Sandslash lv. 29 (Easy Mode) / 32 (Normal Mode) / 35 (Challenge Mode) | In the Pokémon World Tournament side. |
| Hiker Keith | Drilbur lv. 28 (Easy Mode) / 31 (Normal Mode) / 34 (Challenge Mode) Roggenrola lv. 28 (Easy Mode) / 31 (Normal Mode) / 34 (Challenge Mode) |
In the Pokémon World Tournament side. |
| Backpacker Randall | Raticate lv. 29 (Easy Mode) / 32 (Normal Mode) / 35 (Challenge Mode) | In the Pokémon World Tournament side. |
| Hiker Tobias | Roggenrola lv. 28 (Easy Mode) / 31 (Normal Mode) / 34 (Challenge Mode) Timburr lv. 28 (Easy Mode) / 31 (Normal Mode) / 34 (Challenge Mode) |
In the Relic Castle side. |
| Psychic Tully | Swoobat lv. 30 (Easy Mode) / 33 (Normal Mode) / 36 (Challenge Mode) | In the Relic Castle side. |
| Backpacker Annie | Watchog lv. 29 (Easy Mode) / 32 (Normal Mode) / 35 (Challenge Mode) | In the Relic Castle side. |
| Psychic Ena | Baltoy lv. 29 (Easy Mode) / 32 (Normal Mode) / 35 (Challenge Mode) Yamask lv. 29 (Easy Mode) / 32 (Normal Mode) / 35 (Challenge Mode) |
In the Relic Castle side. |