The cheats to change character are incomplete, not all polygon characters are displayed and some of them are named wrong.
Here is the correct code:
00 Mario
01 Fox
02 Donkey Kong
03 Samus
04 Luigi
05 Link
06 Yoshi
07 C. Falcon
08 Kirby
09 Pikachu
0A Jigglypuff
0B Ness
0C Master Hand
0D Metal...