Where to find Gloom in Red, Blue & Yellow

Red & Yellow only
Walk: Cerulean Cave (15%, Yellow only), Route 12 (5%), Route 13 (5%) + 2 more

• Cerulean Cave (1F, 2F) — Walk
• Route 12 — Walk
• Route 13 — Walk
• Route 14 — Walk
• Route 15 — Walk

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