16level cap
Jessie & James fields 3 Pokémon between level 15 and level 16 in Mt. Moon.
Fought at Mt. Moon.
This is around Beat Brock — Pewter City Gym, badge 1 in the story — that page lists everything you can have caught by this point.
Types on this team: Poison ×2Normal
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Ekans Lv 15 Poison | Leer Poison Sting Bite Acid | HP35Attack60Defense44Sp. Atk40Sp. Def40Speed55Total274 | |
 | Meowth Lv 16 Normal | Scratch Growl Fury Swipes Bite | HP40Attack45Defense35Sp. Atk40Sp. Def40Speed90Total290 | |
 | Koffing Lv 15 Poison | Tackle Smog | HP40Attack65Defense95Sp. Atk60Sp. Def60Speed35Total355 |
How to beat this team
Shared weaknesses. Ground hits 2 of 3, Psychic hits 2 of 3, Fighting hits 1 of 3.
Level to be ready for. Lv 16 — Meowth, the highest on the team.
Ground Pokémon you can have caught by this point. From this guide’s own encounter tables, by Beat Brock — Pewter City Gym, badge 1: