You cannot catch Wailord. You can, however, catch Wailmer, which evolve into Wailord starting at level 40.
You can capture a wailord in route 230. If you can not find it you better capture a wailmer and evolve it.
wailord you have to evole from wailmer and relican you find in dive mode.
Yes.
any sea
Train a wailmer for wailord, relicanth has to be found underwater no other way.
find a wailmer then evolve it
you can find it at rout 129
in shinetown city
route 129
You can find it in Route 129 but it is rare.
Evolve a wailmer at level 40.