Okay so I know you can't actually catch it in black and that you have to trade for it from someone who has white...my question is do you actually have to trade it from someone you know in real life with IR trade? I go to search for someone who might have it using the upstairs in the pokemon center but I can't choose thunderous when I go to deposit trade. Sorry if I sound like a noob I haven't played pokemon since the blue version XD
Now that you have an answer, I'm going to go on ahead and lock this thread since there's no use for it anymore. Though next time, please make sure to ask any question you have in our Quick Questions sticky.