Where to catch Corsola

In Hoenn (Ruby, Sapphire & Emerald)

• Ever Grande City — Super Rod, Trade, Walk
• Pacifidlog Town — NPC Trade, Trade
• Route 128 — Super Rod

In Johto & Kanto (Gold, Silver & Crystal)

• Cerulean City — Super Rod
• Cherrygrove City — Good Rod, Super Rod, Walk
• Cianwood City — Good Rod, Super Rod
• Olivine City — Good Rod, Super Rod
• Route 34 — Good Rod, Super Rod
• Sea Route 19 — Good Rod, Super Rod
• Sea Route 40 — Good Rod, Super Rod
• Union Cave — Super Rod

Corsola — full Pokédex entry