Where to find Grimer in HeartGold & SoulSilver

Walk: Route 17 (40%), Route 16 (30%), Route 18 (30%) + 1 more
Surf: Celadon City (90%), Safari Zone (30%)

• Celadon City — Surf
• Johto Safari Zone (Marshland) — Surf, Walk
• Route 16 — Walk
• Route 17 — Walk
• Route 18 — Walk

Grimer in every game · Pokémon HeartGold & SoulSilver interactive map (Johto & Kanto)