Where to find Poliwhirl in Brilliant Diamond & Shining Pearl

Surf: Sinnoh Route 227 (70%), Sinnoh Route 228 (70%), Sinnoh Route 225 (30%)
Walk: Grand Underground
Super Rod: Sinnoh Route 225 (45%)

• Grand Underground — Walk
• Route 225 — Super Rod, Surf
• Route 227 — Surf
• Route 228 — Surf

Poliwhirl in every game · Pokémon Brilliant Diamond & Shining Pearl interactive map (Sinnoh)