43highest level
Fought at Sea Route 223.
This is around Beat Fantina — Hearthome City Gym, badge 5 in the story — that page lists everything you can have caught by this point.
Types on this team: PoisonWater
| Pokémon | Moves | |
|---|---|---|
 | Tentacruel Lv 43 | Barrier Water Pulse Poison Jab Screech |