Thundurus is roaming through Unova. Sometimes you see messages on boards that it's raining heavily at some place, you need to go there and there he is. Be sure you catch it with a master ball or have a pokemon with the move 'block' or 'mind reader' You need to a house near to the celestial tower and talk to an old woman there to see it the first time.
yes
You cannot catch Thundurus in Pokemon Black, he is exclusive to Pokemon White.
You catch Thundurus, but must trade Tornadus from Pokemon Black.
you can catch Zekrom, Victini, Thundurus, Landorus, and Kyurem
you have to evolve him or get a legendary pokemon but its not zekrom,reshiram or thundurus and the others
Thundurus is only available in Pokemon white. You'll notice that he's near when you see an unusual huge storm.
You can catch virizion, terrakion, cobalion, zeckrom, thundurus, landurus,kyurem, and celihidron
You need to trade it across, and catch Thundurus as well. Trade won't let you get Landorus.
Thundurus is version exclusive to Pokemon White, you'll have to trade.
If you're talking about the legendaries, the exclusive one to Pokemon White is Zekrom. You can also catch Kyurem(Giant Chasm), Cobalion (Mistralton Cave), Virizon(Pinwheel Forest), Terrakion (Victory Road), Thundurus (Stormy Route 7) and Landorus (Abundant Shrine).Note : You must have caught Tornadus from Pokemon Black and Thundurus from Pokemon White in order to get Landorus afterwards.
Thundurus.
No, Thundurus can only be transfered from the original Black and White or from the Pokémon Dream Radar 3DS app.