Cerulean Cave
The Unknown Dungeon, also called Cerulean Cave due to being near Cerulean City, is home to high-level wild Pokémon. Only trainers who compete and win in the Pokémon League at Indigo Plateau may enter.
The Unknown Dungeon has had many different layouts, getting a change from one game release to the next.
Pokémon that Appear in the Unknown Dungeon
Pokémon Red/Blue(US), Red/Green(JP), Blue(JP)
- Arbok (Red only)
- Chansey
- Clefable (Japanese Blue only)
- Ditto
- Dodrio
- Electrode
- Golbat
- Hypno
- Kadabra
- Magneton
- Marowak
- Parasect
- Raichu
- Raticate (Japanese Blue only)
- Rhydon
- Sandslash (American Blue, Japanese Green and Japanese Blue only)
- Venomoth
- Wigglytuff