25level cap
Morty fields 4 Pokémon between level 23 and level 25 in Ecruteak Gym.
This is around Ecruteak City — Morty and the Fog Badge in the story — that page lists everything you can have caught by this point.
Types on this team: Ghost ×3Poison ×2Normal
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Haunter Lv 24 GhostPoison | Hypnosis Nightmare Curse Night Shade | HP45Attack50Defense45Sp. Atk115Sp. Def55Speed95Total405 | |
 | Stantler Lv 23 Normal | Swift Hypnosis Nightmare Leer | HP73Attack95Defense62Sp. Atk85Sp. Def65Speed85Total465 | |
 | Misdreavus Lv 24 Ghost | Shadow Ball Pain Split Perish Song Psywave | HP60Attack60Defense60Sp. Atk95Sp. Def95Speed90Total460 | |
 | Gengar Lv 25 GhostPoison | Held item Miracleberry | Hypnosis Shadow Ball Mean Look Dream Eater | HP60Attack65Defense60Sp. Atk130Sp. Def75Speed110Total500 |
How to beat this team
Shared weaknesses. Dark hits 3 of 4, Ghost hits 3 of 4, Ground hits 2 of 4, Psychic hits 2 of 4.
Level to be ready for. Lv 25 — Gengar, the highest on the team.
Dark Pokémon you can have caught by this point. From this guide’s own encounter tables, by Ecruteak City — Morty and the Fog Badge: