43level cap
Koga fields 5 Pokémon between level 41 and level 43 in Fuchsia City Gym.
This is around Rainbow Badge — Pokémon Tower to Fuchsia City — Lv. 43 cap in the story — that page lists everything you can have caught by this point.
Types on this team: Poison ×5BugFlyingWater
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Crobat Lv 41 PoisonFlying | Ability Inner Focus | Toxic Fly Bite Confuse Ray | HP85Attack90Defense80Sp. Atk70Sp. Def80Speed130Total535 |
 | Muk Lv 42 Poison | Ability Stench Held item Poison Barb | Minimize Sludge Bomb Acid Armor Toxic | HP105Attack105Defense75Sp. Atk65Sp. Def100Speed50Total500 |
 | Tentacruel Lv 41 WaterPoison | Ability Clear Body Held item Mystic Water | Sludge Bomb Surf Ice Beam Barrier | HP80Attack70Defense65Sp. Atk80Sp. Def120Speed100Total515 |
 | Weezing Lv 43 Poison | Ability Levitate Held item Leftovers | Toxic Sludge Bomb Amnesia Pain Split | HP75Attack90Defense120Sp. Atk85Sp. Def70Speed60Total500 |
 | Venomoth Lv 42 BugPoison | Ability Shield Dust | Psychic Double Team Signal Beam Toxic | HP70Attack75Defense60Sp. Atk95Sp. Def75Speed100Total475 |
How to beat this team
Shared weaknesses. Psychic hits 5 of 5, Ground hits 3 of 5, Electric hits 2 of 5, Rock hits 2 of 5.
Level to be ready for. Lv 43 — Weezing, the highest on the team.
Psychic Pokémon you can have caught by this point. From this guide’s own encounter tables, by Rainbow Badge — Pokémon Tower to Fuchsia City — Lv. 43 cap: