Ok, thank you! I thought of the file thing right after I already made an edit. I`ll try this out later because I`m on mt DSI right now.

I am new to any kind of hacking & I started my first texture hack today. I changed a few things in Wario and went inti the game to check my progress NOTHING new was there. Yes I saved it to my SD card. I renamed it as FitWario04.pac or FitWario.04.pac. When I checked my progress in BrawlBox only a white outline of Wario came up. Can anyone help? Please respond ASAP!

EDIT: All I changed was his button & the bomb on his jacket. I also used paint.