21level cap
Whitney fields 3 Pokémon between level 20 and level 21 in Goldenrod Gym.
This is around Goldenrod City — Whitney and the Plain Badge in the story — that page lists everything you can have caught by this point.
Types on this team: Normal ×3
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Clefairy Lv 20 Normal | Headbutt Charm Ice Punch Metronome | HP70Attack45Defense48Sp. Atk60Sp. Def65Speed35Total323 | |
 | Teddiursa Lv 20 Normal | Headbutt Metal Claw Lick Mud-Slap | HP60Attack80Defense50Sp. Atk50Sp. Def50Speed40Total330 | |
 | Miltank Lv 21 Normal | Held item Miracleberry | Rollout Attract Stomp Milk Drink | HP95Attack80Defense105Sp. Atk40Sp. Def70Speed100Total490 |
How to beat this team
Shared weaknesses. Fighting hits 3 of 3.
Level to be ready for. Lv 21 — Miltank, the highest on the team.
Fighting Pokémon you can have caught by this point. From this guide’s own encounter tables, by Goldenrod City — Whitney and the Plain Badge: