The post-game dungeon, opened only after you become Champion and reached by Surfing north-west out of Cerulean City. The highest-level wild Pokemon in the game live here, and Mewtwo waits at level 70 at the deepest point.
Home To
Where something is met, and how. Characters are here as well as creatures: the guide records where Professor Oak stands and where each Gym Leader is fought.
| Home To | Encounter Method | Encounter Level | Encounter Rate |
|---|---|---|---|
| Sandslash | Cave | 52–56 | 10 % |
| Golbat | Cave | 50–59 | 40 % |
| Gloom | Cave | 55–58 | 10 % |
| Parasect | Cave | 54–54 | 5 % |
| Venomoth | Cave | 54–54 | 5 % |
| Poliwag | Good Rod | 10–10 | 50 % |
| Weepinbell | Cave | 55–58 | 10 % |
| Graveler | Cave | 45–55 | 15 % |
| Lickitung | Cave | 50–55 | 5 % |
| Rhyhorn | Cave | 50–52 | 10 % |
| Rhydon | Cave | 58–62 | 10 % |
| Chansey | Cave | 56–56 | 5 % |
| Goldeen | Good Rod | 10–10 | 50 % |
| Goldeen | Super Rod | 25–30 | 40 % |
| Seaking | Super Rod | 35–60 | 60 % |
| Magikarp | Old Rod | 5–5 | 100 % |
| Ditto | Cave | 55–65 | 15 % |
| Mewtwo | One-time battle | 70–70 | 5 % |