Where to find Dewgong in Diamond, Pearl & Platinum

Only in Diamond & Platinum
Surf: Sinnoh Victory Road (30%, Only in Platinum), Sinnoh Sea Route 226 (5%, Only in Diamond), Sinnoh Sea Route 230 (5%, Only in Diamond)
Walk: Sinnoh Victory Road (15%, Only in Platinum)

• Sea Route 226 — Surf
• Sea Route 230 — Surf
• Victory Road (1F (Room 2)) — Surf, Walk

Dewgong in every game · Pokémon Diamond, Pearl & Platinum interactive map (Sinnoh)