Well they are modifiers, so you'll have to convert them to single codes or just wait for 1.4 which has support for modifier cheats. Here they are directly from the beta file.
Cheat11="Story Mode\Player 1\Character Modifier",800A4B3B 00??
Cheat12="Story Mode\Player 2\Character Modifier",800A4BAF 00??
Cheat13="Story Mode\Player 3\Character Modifier",800A4C23 00??
Cheat14="Story Mode\Player 4\Character Modifier",800A4C97 00??
Cheat31="VS. Mode\Player 1\Character Modifier",800A4D2B 00??
Cheat32="VS. Mode\Player 2\Character Modifier",800A4D9F 00??
Cheat33="VS. Mode\Player 3\Character Modifier",800A4E13 00??
Cheat34="VS. Mode\Player 4\Character Modifier",800A4E87 00??
Options:
$00 Mario,$01 Fox,$02 DK,$03 Samus,$04 Luigi,$05 Link,$06 Yoshi,$07 C. Falcon,$08 Kirby,$09 Pikachu,$0A Jigglypuff,$0B Ness,$0C Master Hand,$0D Metal Mario,$0E Polygon Mario,$10 Polygon DK,$13 Polygon Link,$14 Polygon Yoshi,$15 Polygon Samus,$18 Polygon Kirby,$1A Giant Donkey Kong