23level cap
Rival (Squirtle) fields 4 Pokémon between level 20 and level 23 in S.S. Anne 2F Corridor.
This is around Cascade Badge — Vermilion City — Lv. 25 cap in the story — that page lists everything you can have caught by this point.
Types on this team: Normal ×2FlyingPsychicWater
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Pidgeotto Lv 21 NormalFlying | Ability Keen Eye | Gust Quick Attack Wing Attack Whirlwind | HP63Attack60Defense55Sp. Atk50Sp. Def50Speed71Total349 |
 | Raticate Lv 20 Normal | Ability Guts | Quick Attack Bite Hyper Fang Focus Energy | HP55Attack81Defense60Sp. Atk62Sp. Def70Speed97Total425 |
 | Kadabra Lv 20 Psychic | Ability Synchronize | Teleport Confusion Kinesis Disable | HP40Attack35Defense30Sp. Atk120Sp. Def70Speed105Total400 |
 | Wartortle Lv 23 Water | Ability Torrent | Headbutt Bite Bubble Beam Rapid Spin | HP59Attack63Defense80Sp. Atk65Sp. Def80Speed58Total405 |
How to beat this team
Shared weaknesses. Electric hits 2 of 4, Bug hits 1 of 4, Dark hits 1 of 4, Fighting hits 1 of 4.
Level to be ready for. Lv 23 — Wartortle, the highest on the team.
Electric Pokémon you can have caught by this point. From this guide’s own encounter tables, by Cascade Badge — Vermilion City — Lv. 25 cap: