Location, Unova
Castelia Sewers: 4 species in 1 game
Area 1 of 2
Castelia Sewers: 4 species across 2 versions
| Species | Method | Levels | Chance | Game page |
|---|---|---|---|---|
 Rattata | Walking in tall grass or a cave | 14 to 17 | 45% | All places |
 Zubat | Walking in tall grass or a cave | 14 to 17 | 45% | All places |
 Grimer | Fishing with a super rod | 40 to 70 | 100% | All places |
| Grimer | Fishing in dark spots | 40 to 60 | 80% | All places |
| Grimer | Surfing | 5 to 15 | 100% | All places |
| Grimer | Surfing in dark spots | 5 to 20 | 95% | All places |
| Grimer | Walking in tall grass or a cave | 15 to 17 | 10% | All places |
 Muk | Fishing in dark spots | 50 to 70 | 20% | All places |
| Muk | Surfing in dark spots | 5 to 20 | 5% | All places |
Area 2 of 2
Castelia Sewers (unknown Area 38): 4 species across 2 versions
| Species | Method | Levels | Chance | Game page |
|---|---|---|---|---|
| Rattata | Walking in tall grass or a cave | 14 to 17 | 45% | All places |
| Zubat | Walking in tall grass or a cave | 14 to 17 | 45% | All places |
| Grimer | Fishing with a super rod | 40 to 70 | 100% | All places |
| Grimer | Fishing in dark spots | 60 | 80% | All places |
| Grimer | Surfing | 5 to 15 | 100% | All places |
| Grimer | Surfing in dark spots | 5 to 20 | 95% | All places |
| Grimer | Walking in tall grass or a cave | 15 to 17 | 10% | All places |
| Muk | Fishing in dark spots | 70 | 20% | All places |
| Muk | Surfing in dark spots | 5 to 20 | 5% | All places |