Where to find Marill in FireRed & LeafGreen

Surf: Ruin Valley (100%), Four Island (70%), Icefall Cave (5%)
Walk: Ruin Valley (10%)

• Four Island — Surf
• Icefall Cave (Entrance) — Surf
• Ruin Valley — Surf, Walk

Marill in every game · Pokémon FireRed & LeafGreen interactive map (Sevii Islands)