by putting in a pokemon that knows mean look then use that move so he cant flee then just keep throwing ultra balls at him and eventully he will be caught.
but make sure the pokemon the knows mean look doesnt faint because then thundorus can escape.
You must trade from Pokemon White, which instead of Tornadus, it will be Thunderus. :)
trade. no other way.
Throw a pokeball at it.
First catch Thunderus then Tornadus then go to Abundant Shrine.
if you talk to the shrine with tornadus and thunderus then landorus attacks you and you can catch it in battle.
Get both Tornadus and Thunderus to the Abundant Shrine and it will appear
catch thunderus(white) and tornadus(black) and go to the top of abundant shrinethey have to be on your team
ok now listen you need to stick your hand in your butt
You can't get Thunderus in Pokemon Platinum at all. By then when Pokemon Platinum was made, no one knew that Pokemon Black and White were going to be made.
In Pokemon black you catch RESHIRAM and TORNADUS In Pokemon white you catch ZEKROM and THUNDERUS Sources : myself
i just used loads of ultra balls until i caught him
You catch Thundurus, but must trade Tornadus from Pokemon Black.