You cannot catch a Wailord but you can, however, evolve a Walmer at level 45.
You do not need a Wailord to catch a Registeel in Pokemon Emerald. You may need a Wailord or any other water-type Pokemon to surf to the place where you catch Registeel, but other than that, you don't need a Wailord.
you have to get him on the poke walker well. that's were i got my-in
You can't catch bastiodon in Pokemon soulsilver.
You cannot catch Wailord. You can, however, catch Wailmer, which evolve into Wailord starting at level 40.
No, but a 45 wailmer is basically a wailord.
in magma hideout
catch it? no.
Catch a wailmer and get it to level 40.
You cannot catch Heatran in Pokémon SoulSilver, you will have to trade for it.
No, you can not catch Phanpy in SoulSilver. It is a version exclusive to HeartGold.
You cannot catch Celebi in Pokemon Soulsilver, you have to transfer it from Diamond and Pearl (if you have it in those games).
on heartgold and soulsilver level up wailmer to level 40. on diamond pearl and platinum go to route 223 and use the super rod and then you will have a wailord.