24level cap
This fight happens in Tier 3 of 8 — fought with 2 badges already (level cap 24) only.
Viola fields 4 Pokémon between level 21 and level 24 in Rustboro City Gym.
This is around 2 badges in the story — that page lists everything you can have caught by this point.
Types on this team: Bug ×4Flying ×2Water
| Pokémon | Ability & item | Moves | Base stats | |
|---|---|---|---|---|
 | Surskit Lv 21 BugWater | Ability Swift Swim | Bubble Beam Quick Attack Bug Bite Sticky Web | HP40Attack30Defense32Sp. Atk50Sp. Def52Speed65Total269 |
 | Volbeat Lv 23 Bug | Ability Swarm | Bug Bite Confuse Ray Double Team Aerial Ace | HP65Attack73Defense75Sp. Atk47Sp. Def85Speed85Total430 |
 | Ninjask Lv 22 BugFlying | Ability Speed Boost | Metal Claw Fury Cutter Bug Bite Double Team | HP61Attack90Defense45Sp. Atk50Sp. Def50Speed160Total456 |
 | Beautifly Lv 24 BugFlying | Ability Swarm Held item Oran Berry | Mega Drain Gust Bug Bite Whirlwind | HP60Attack70Defense50Sp. Atk100Sp. Def50Speed65Total395 |
How to beat this team
Shared weaknesses. Flying hits 4 of 4, Rock hits 4 of 4, Electric hits 3 of 4, Fire hits 3 of 4.
Level to be ready for. Lv 24 — Beautifly, the highest on the team.
Flying Pokémon you can have caught by this point. From this guide’s own encounter tables, by 2 badges: