15highest level
Fought at Route 11.
This is around Mission 3 — Vermilion City and the S.S. Anne in the story — that page lists everything you can have caught by this point.
Types on this team: Poison
| Pokémon | Moves | |
|---|---|---|
 | Ekans Lv 15 | Leer Poison Sting Bite Glare |