Where to find Seel in Red, Blue & Yellow

NPC Trade: Cinnabar Island (Trade a Ponyta, Red & Blue only)
Walk: Seafoam Islands (75%)

• Cinnabar Island — NPC Trade
• Seafoam Islands (1F, B1F, B2F, B3F, B4F) — Walk

Seel in every game · Pokémon Red, Blue & Yellow interactive map (Kanto)