Off the east coast of Lilycove.
Evolve a wailmer at level 40.
the easiest place to catch it is on mossdeep city and use a super rod in the water, you will ALWAYS find a wailmer this way
Just train a wailmer to level 40.
Wailmer evolves at Level 40.
the Pokemon wailmer can learn it so can clamperl.
You can capture wailmer in ruby, sapphire and emerald on most routes where water is you can find either by using a rod or by using surf.
Evolve Wailmer
water!
The only way the Wailmer will move is that you must clear out the Team Magma Hideout north of the Wailmer. After you achieve this, the Wailmer and the man training the Wailmer will disappear.
Level 40
Level 35
Yes but its rare.