Thundurus is only available in Pokemon white. You'll notice that he's near when you see an unusual huge storm.
yes
You cannot catch Thundurus in Pokemon Black, he is exclusive to Pokemon White.
You can catch virizion, terrakion, cobalion, zeckrom, thundurus, landurus,kyurem, and celihidron
you have to evolve him or get a legendary pokemon but its not zekrom,reshiram or thundurus and the others
you can catch Zekrom, Victini, Thundurus, Landorus, and Kyurem
You catch Thundurus, but must trade Tornadus from Pokemon Black.
No, they do not have to be the same level to get Landorus.
You need to trade it across, and catch Thundurus as well. Trade won't let you get Landorus.
You should have a pokemon like wynaught so it can prevent thundurus from fleeing, then use false swipe and try to catch it with a timer ball a bunch of times. Or, you could just lower its HP when you see it and catch it with a quick ball just like i did. LOL
According to my experiences, Landius is probably the rarest and hardest to catch. First, you must have Tornadus and Thundurus in your party. Then, you can catch it!
in white you have to you must trade for landorus (catch it in black) in white you can get thundurus by finding it (it moves check the eletric bullet boards
one thundurus were made