Where to find Dewgong in Red, Blue & Yellow

Walk: Seafoam Islands (10%)
NPC Trade: Cinnabar Island (Trade a Growlithe, Yellow only)

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

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