- Stan Marsh as Mario
- Kyle Broflovski as Luigi
- Wendy Testaburger as Princess Peach
- Ash (From Pokemon) as Green Yoshi
- Kenny McCormick as Yellow Yoshi
- Tammy Warner as Red Yoshi
- Bebe Stevens as Blue Yoshi
- Eric Cartman as Bowser
- Ememy as Bowser's Minions
- Rick (From Kirby) as Lemmy "Hip" Koopa
- Coo (From Kirby) as Iggy "Hop" Koopa
- Kine (From Kirby) as Larry "Cheatsy" Koopa
- The Fox (From Garfield and Friends) as Ludwig "Kooky" Von Koopa
- Shelly Marsh as Wendy "Kootie Pie" Koopa
- Wart (From Garfield and Friends) Morton "Big Mouth" Koopa Jr.
- Gort (From Garfield and Friends) as Roy "Bully" Koopa
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