22highest level
Fought at Route 8.
This is around Mission 4 — Lavender Town and Pokémon Tower in the story — that page lists everything you can have caught by this point.
Types on this team: Poison
| Pokémon | Moves | |
|---|---|---|
 | Koffing Lv 22 | Smokescreen Assurance Clear Smog Sludge |