Metroid/Finding Nemo

Cast

 * Mario (from Mario) as Marlin
 * Pikachu (from Pokemon) as Nemo
 * Samus as Dory
 * Ridley as Bruce
 * Knuckles (from Sonic) as Gill
 * Luigi (from Mario) as Bloat
 * Zero Suit Samus as Deb
 * Shadow (from Sonic) as Nigel
 * Kirby (from Kirby) as Sheldon
 * and more