Where to find Quagsire in HeartGold & SoulSilver

Walk: Route 10 (30%, Night), Route 27 (30%, Night), Mt. Silver Cave (30%) + 8 more
Surf: Ruins of Alph (40%), Union Cave (40%), Route 32 (30%) + 5 more

• Cliff Cave — Walk
• Cliff Edge Gate — Surf
• Johto Safari Zone (Wetland) — Surf, Walk
• Mt. Silver — Walk
• Mt. Silver Cave (3F, Upper Mountainside, 2F, Expert Belt Chamber, Moltres Chamber) — Walk
• Route 10 — Walk
• Route 12 — Surf
• Route 13 — Surf, Walk
• Route 14 — Walk
• Route 15 — Walk
• Route 26 — Walk
• Route 27 — Walk
• Route 32 — Surf
• Route 47 — Surf, Walk
• Ruins of Alph — Surf
• Union Cave (1F, B1F, B2F) — Surf

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