20highest level
Lass Jean fields 3 Pokémon between level 18 and level 20 in Past Route 10 Schoolhouse.
This is around The sea routes, the Argent Depths and the S.S. Mako in the story — that page lists everything you can have caught by this point.
Types on this team: ElectricFireNormal
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Growlithe Lv 18 Fire | The game’s documentation doesn’t list this trainer’s exact moves. Level-up moves Growlithe knows by Lv 18 in Pokémon Peridot Version: Bite Leer Quick Attack Flame Wheel | HP55Attack70Defense45Sp. Atk70Sp. Def50Speed60Total350 | |
 | Mareep Lv 19 Electric | The game’s documentation doesn’t list this trainer’s exact moves. Level-up moves Mareep knows by Lv 19 in Pokémon Peridot Version: Thundershock Hypnosis Spark Double-Edge | HP55Attack40Defense40Sp. Atk65Sp. Def45Speed35Total280 | |
 | Furret Lv 20 Normal | The game’s documentation doesn’t list this trainer’s exact moves. Level-up moves Furret knows by Lv 20 in Pokémon Peridot Version: Quick Attack Fury Swipes Agility Bite | HP85Attack76Defense64Sp. Atk45Sp. Def55Speed90Total415 |
How to beat this team
Shared weaknesses. Ground hits 2 of 3, Fighting hits 1 of 3, Rock hits 1 of 3, Water hits 1 of 3.
Level to be ready for. Lv 20 — Furret, the highest on the team.
Ground Pokémon you can have caught by this point. From this guide’s own encounter tables, by The sea routes, the Argent Depths and the S.S. Mako: