CAA: Christian Anime Alliance

I need it because I want to be able to make film of my smash 4 matches that I can watch on my laptop because I always have my laptop with me but not always my 3ds so that way I can see what I need to improve no matter where I am. Unless of course I'm in class. but everywhere else.

This site seems to have what you're looking for:

http://www.3dsvideocapture.com/

It does feel like the prices are rather unreasonable, however. If that isn't up your alley, a lot of people found this video helpful.

https://www.youtube.com/watch?v=bkBBccWcTpQ