51level cap
Juan (Rematch 1) fields 5 Pokémon between level 46 and level 51 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 ×5DarkDragonGroundIce
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Poliwag Lv 46 Water | Ability Water Absorb | Hypnosis Rain Dance Protect Hydro Pump | HP40Attack50Defense40Sp. Atk40Sp. Def40Speed90Total300 |
 | Whiscash Lv 46 WaterGround | Ability Oblivious | Rain Dance Water Pulse Double Team Fissure | HP110Attack78Defense73Sp. Atk76Sp. Def71Speed60Total468 |
 | Walrein Lv 48 IceWater | Ability Thick Fat | Water Pulse Body Slam Protect Ice Beam | HP110Attack80Defense90Sp. Atk95Sp. Def90Speed65Total530 |
 | Crawdaunt Lv 48 WaterDark | Ability Hyper Cutter Held item Chesto Berry | Rest Crabhammer Taunt Double Team | HP63Attack120Defense85Sp. Atk90Sp. Def55Speed55Total468 |
 | Kingdra Lv 51 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 4 of 5, Electric hits 3 of 5, Fairy hits 2 of 5, Fighting hits 2 of 5.
Level to be ready for. Lv 51 — 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: