Forbidden Seven

The forbidden seven is a name given to the seven characters who's incomplete files were found on the Super Smash Bros Brawl game disk. What exactly these files mean is unknown, most people believe they were originally intended to be playable but were cut from the roster. The characters in question are:

Roy

Mewtwo

Dr. Mario

Dixie Kong

Toon Zelda

Toon Sheik

Pra and Mai (believed to be Plusle and Minum working together as an Ice Climber like team, based on these being the first syllables of their respective Japanese names)