66level cap
Juan (Rematch 4) fields 6 Pokémon between level 61 and level 66 in Sootopolis City Gym.
This is around Beat the Elite Four and Champion Steven in the story — that page lists everything you can have caught by this point.
Types on this team: Water ×6Ice ×2DarkDragonGround
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Lapras Lv 61 WaterIce | Ability Water Absorb | Hydro Pump Perish Song Ice Beam Confuse Ray | HP130Attack85Defense80Sp. Atk85Sp. Def95Speed60Total535 |
 | Whiscash Lv 63 WaterGround | Ability Oblivious | Rain Dance Water Pulse Double Team Fissure | HP110Attack78Defense73Sp. Atk76Sp. Def71Speed60Total468 |
 | Politoed Lv 61 Water | Ability Water Absorb | Hypnosis Rain Dance Hydro Pump Perish Song | HP90Attack75Defense75Sp. Atk90Sp. Def100Speed70Total500 |
 | Walrein Lv 63 IceWater | Ability Thick Fat | Water Pulse Body Slam Protect Sheer Cold | HP110Attack80Defense90Sp. Atk95Sp. Def90Speed65Total530 |
 | Crawdaunt Lv 63 WaterDark | Ability Hyper Cutter Held item Chesto Berry | Rest Guillotine Taunt Double Team | HP63Attack120Defense85Sp. Atk90Sp. Def55Speed55Total468 |
 | Kingdra Lv 66 WaterDragon | Ability Swift Swim Held item Chesto Berry | Water Pulse Double Team Ice Beam Rest | HP75Attack95Defense95Sp. Atk95Sp. Def95Speed85Total540 |
How to beat this team
Shared weaknesses. Grass hits 5 of 6, Electric hits 4 of 6, Fighting hits 3 of 6, Fairy hits 2 of 6.
Level to be ready for. Lv 66 — Kingdra, the highest on the team.
Grass Pokémon you can have caught by this point. From this guide’s own encounter tables, by Beat the Elite Four and Champion Steven: