35level cap
Erika (as your 4th badge) fields 4 Pokémon between level 31 and level 35 in Celadon City Gym.
This is around Beat Erika — Celadon City Gym, badge 4 in the story — that page lists everything you can have caught by this point.
Types on this team: Grass ×4Poison ×3
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Tangela Lv 33 Grass | Bind Stun Spore Sleep Powder Mega Drain | HP65Attack55Defense115Sp. Atk100Sp. Def100Speed60Total495 | |
 | Victreebel Lv 34 GrassPoison | Stun Spore Acid Headbutt Razor Leaf | HP80Attack105Defense65Sp. Atk100Sp. Def100Speed70Total520 | |
 | Ivysaur Lv 31 GrassPoison | Razor Leaf Acid Leech Seed | HP60Attack62Defense63Sp. Atk80Sp. Def80Speed60Total405 | |
 | Vileplume Lv 35 GrassPoison | Acid Solarbeam Stun Spore Sleep Powder | HP90Attack80Defense85Sp. Atk100Sp. Def100Speed50Total505 |
How to beat this team
Shared weaknesses. Fire hits 4 of 4, Flying hits 4 of 4, Ice hits 4 of 4, Psychic hits 3 of 4.
Level to be ready for. Lv 35 — Vileplume, the highest on the team.
Fire Pokémon you can have caught by this point. From this guide’s own encounter tables, by Beat Erika — Celadon City Gym, badge 4:
- Magmar — Celadon City, Lv 22
- Growlithe — Route 8, Lv 17
- Charmander — Route 24, Lv 13
- Vulpix — Route 2, Lv 5