Good or Super rod. You have to fish right at the entrance of Victory Road.
supe rod
you use the good rod in a river or somewhere :/
catch a wailmer with a super rod then level it to 40
you want catch it with the rod in rout 119.
Use the Super Rod in Lilycove City.
I know in emerald you can at Mossdeep with a super rod.
To catch a Pokemon with a rod, you have to use the rod, then wait until a "!" appears above your character's head. Once that happens, press "a" as fast as you can before it gets away. If you land the Pokemon, you get to battle it.
on rount 119 note use super rod
Route 128 or Evergrande City (Super Rod)
Go to meteor falls and use a super rod.
No, but a 45 wailmer is basically a wailord.
In Pokemon Emerald players can find the Luvdisc on Route 128. Players can also fish from them using a super rod.