Sonic/Toy Story 2

Sonic as Woody

Shadow as Buzz Lightyear

Sid (from Ice Age) as Hamm

Knuckles as Mr Potato Head

Rouge as Mrs Potato Head

Tails as Slinky Dog

Vector as Rex

Bart (from The Simpsons) as Andy

Marge (from The Simpsons) as Mr Davis

Maggie (from The Simpson) as Molly

Santa (from The Simpsons) as Buster

Amy as Jessie

Chip as Bullseye

Delta as Alien 1

Beta as Alien 2

Epilson as Alien 3

Big The Cat as Sarge

Omega as Prospector

Eggman as Zurg