Omanyte locations — where to catch

In Sinnoh (Diamond, Pearl & Platinum)

• Oreburgh City — Gift

In Johto & Kanto (HeartGold & SoulSilver)

• Pewter City — Gift

In Kanto (FireRed & LeafGreen)

• Cinnabar Island — Gift

In Kanto (Red, Blue & Yellow)

• Cinnabar Island — Gift

Other games (5)

• Brilliant Diamond / Shining Pearl (Gen 8): Oreburgh City
• Let's Go, Pikachu! / Let's Go, Eevee! (Gen 7): Cinnabar Island
• Ultra Sun / Ultra Moon (Gen 7): Alola Route 8
• Omega Ruby / Alpha Sapphire (Gen 6): Rustboro City
• X / Y (Gen 6): Ambrette Town

Omanyte — full Pokédex entry