I want to learn, but not sure where to start

[A.J. Nitro]

I've got all the characters unpacked from SSBB if you'd like me to send them to you. Otherwise you'd need to get an ISO (or unpacked game-file) of it and extract the files with Dolphin. The character files would be located in fighter. They'll be .pac files which I think can be opened with the BRRES viewer.

Do you have everything including assist trophies? Either way, you can send them to me through a private message.