Okay, here's how this works.
When you go into the folder, that is everything that defines what that character is.
The motion file is what mario actually does. It's what tells mario how to move.
The mario01 and all numbered character files contain the model and textures, so it's what mario looks like.
A file that is just fitmario.pac has the atack values and other stuff.
So, fitmariomotionetc.pac goes in the mario folder.
So, your mario folder should (probably) look like this:
Fitmario.pac
Fitmario00.pac
(also, any more Fitmario##.pac files you may have for extra textures n'stuff)
Fitmariomotionetc.pac