Where to find Tentacool in Brilliant Diamond & Shining Pearl

Surf: Canalave City (60%), Fuego Ironworks (60%), Iron Island (60%) + 9 more
Walk: Grand Underground

• Canalave City — Surf
• Fuego Ironworks — Surf
• Grand Underground — Walk
• Iron Island — Surf
• Pastoria City — Surf
• Route 205 — Surf
• Route 213 — Surf
• Route 218 — Surf
• Route 219 — Surf
• Route 221 — Surf
• Route 222 — Surf
• Sea Route 220 — Surf
• Valley Windworks — Surf

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