Where to catch Wailmer

In Hoenn (Ruby, Sapphire & Emerald)

• Dewford Town — Good Rod, Old Rod, Super Rod
• Ever Grande City — Good Rod, Old Rod, Super Rod, Walk
• Lilycove City — Good Rod, Old Rod, Super Rod
• Mossdeep City — Good Rod, Old Rod, Super Rod
• Pacifidlog Town — Good Rod, Old Rod, Super Rod
• Route 103 — Good Rod, Old Rod, Super Rod
• Route 105 — Good Rod, Old Rod, Super Rod
• Route 106 — Good Rod, Old Rod, Super Rod
• Route 107 — Good Rod, Old Rod, Super Rod
• Route 108 — Good Rod, Old Rod, Super Rod
• Route 109 — Good Rod, Old Rod, Super Rod
• Route 110 — Good Rod, Old Rod, Super Rod
• Route 115 — Good Rod, Old Rod, Super Rod
• Route 121 — Good Rod, Old Rod, Super Rod
• Route 122 — Good Rod, Old Rod, Super Rod
• Route 123 — Good Rod, Old Rod, Super Rod
• Route 124 — Good Rod, Old Rod, Super Rod
• Route 125 — Good Rod, Old Rod, Super Rod
• Route 126 — Good Rod, Old Rod, Super Rod
• Route 127 — Good Rod, Old Rod, Super Rod
• Route 128 — Good Rod, Old Rod, Super Rod
• Route 129 — Good Rod, Old Rod, Super Rod
• Route 130 — Good Rod, Old Rod, Super Rod
• Route 131 — Good Rod, Old Rod, Super Rod
• Route 132 — Good Rod, Old Rod, Super Rod
• Route 133 — Good Rod, Old Rod, Super Rod
• Route 134 — Good Rod, Old Rod, Super Rod
• Seafloor Cavern — Good Rod, Old Rod, Super Rod
• Shoal Cave — Old Rod
• Slateport City — Good Rod, Old Rod, Super Rod

Wailmer — full Pokédex entry