Mario Kart Wii discussion

No I don't. Different games usually have different files (I'm lucky that both Mario Kart Wii and Super Smash Bros. Brawl use .brstm music), such as Mario Kart Wii having .szs files and Brawl having .pcs and .pac files. So I don't know any other method for hacking games such as Mario Sports Mix or Mario Super Sluggers, or New Super Mario Bros. Wii
 
I heard about New Super Mario Bros. Wii hacking, but I haven't gotten into it myself
 
I don't care about level editor so far. All I want is if hacking a character to look like Baby Luigi is possible.
 
Well, Baby Luigi is my favorite character and hacking him into New Super Mario Bros. Wii is a dream come true to me
 
Baby Luigi in Brawl (with his voice too) is, like, heaven
 
I think I can replace the opening movie with something else, but I don't know how.