Castelia Sewers
| Encounter Method | Available Pokémon | ||||
|---|---|---|---|---|---|
| Sewer |  Grimer Lv: 19-20 20.0% |  Koffing Lv: 19-20 20.0% |  Rattata Lv: 19-20 10.0% |  Zubat Lv: 19-20 10.0% |  Gulpin Lv: 19-20 10.0% |
 Trubbish Lv: 19-20 10.0% |  Spinarak Lv: 19-20 10.0% |  Gastly Lv: 19-20 5.0% |  Slowpoke Lv: 19-20 5.0% | ||
| Surf | Grimer Lv: 25-35 60.0% |  Stunfisk Lv: 25-35 30.0% |  Palpitoad Lv: 25-35 5.0% | Palpitoad Lv: 30-40 5.0% | |
| Surf, Rippling Water | Stunfisk Lv: 30-40 60.0% | Palpitoad Lv: 30-40 30.0% |  Seismitoad Lv: 35-45 5.0% |  Muk Lv: 35-45 5.0% | |
| Fish | Grimer Lv: 10-20 65.0% | Stunfisk Lv: 10-20 35.0% | |||
| Fish, Rippling Water | Grimer Lv: 10-23 65.0% | Stunfisk Lv: 17-23 35.0% | |||