Where to find Slowbro in FireRed & LeafGreen

LeafGreen only
Surf: Cerulean Cave (70%), Seafoam Islands (1%)
Super Rod: Cinnabar Island (4%)
Walk: Seafoam Islands (15%)

• Cerulean Cave (1F, B1F) — Surf
• Cinnabar Island — Super Rod
• Seafoam Islands (B1F, B2F, B3F, B4F) — Surf, Walk

Slowbro in every game · Pokémon FireRed & LeafGreen interactive map (Kanto)