Kalos walkthrough section
Pokemon X and Y Phase 4: Pre-Gym Rival Multi-Battle
Plant Badge Before the gym entrance, your rival (Calem/Serena) intercepts you and proposes a multi-battle: you and your rival as a team against Tierno + Trevor .
Phase 4 Plant Badge Ramos Coumarine Gym Leader Surf, Azure Bay, Coumarine City, Fly, and Ramos. 04 / 10 
Phase 4 section 7 of 9
Before the gym entrance, your rival (Calem/Serena) intercepts you and proposes a multi-battle: you and your rival as a team against Tierno + Trevor .
GuidePokemon X and Y
PhasePhase 4
Section7/9
Pre-Gym Rival Multi-Battle
Before the gym entrance, your rival (Calem/Serena) intercepts you and proposes a multi-battle: you and your rival as a team against Tierno + Trevor. This is the canonical "all five protagonists fight together" moment, structured as a 2v2 double battle.
The multi-battle
| Side | Trainer | Roster |
|---|---|---|
| You + Ally | Calem/Serena (ally) | AI uses their full party — Floette, Honedge, and starter (Lv 30+) |
| Opponent | Tierno | Likely Crawdaunt Lv 30 + Roserade Lv 30 (rosters approximate; exact lineup poorly documented) |
| Opponent | Trevor | Likely Aerodactyl Lv 30 + Florges Lv 30 (rosters approximate; exact lineup poorly documented) |
Source caveat: The exact Pokémon Tierno and Trevor use at this Coumarine pre-gym multi-battle isn't well-documented across the major XY walkthrough sources I could verify. Their Route 19 late-game rosters are confirmed, but the Coumarine pre-gym specifics vary. Expect their teams to be around Lv 29–31 with type variety — bring coverage.
Multi-battle tip: Your rival AI picks moves that boost both teammates (Helping Hand, Light Screen) and tends to target whichever opponent's mon is weaker. Lead with a sweeper (Mega Lucario, Hawlucha, Pangoro) — let the rival mop up clean-up.
Dex quick links
