The Cutting Room Floor/Mario Vs. Cartoon Land

JP: July 13, 2003 (GBA), February 1, 2005 (DS)

US: October 5, 2003 (GBA), February 3, 2005 (DS)

PAL: December 2, 2003 (GBA), February 4, 2005 (DS)

Name
In Japan it's called "Super Mario in Animation Land", but it was renamed in America due to the name not being marketable.

Typo Fixes

 * "Mike Wasowski" became "Mike Wazowski"

Regional Name Changes

 * A joke about how Teresa (Boo from Mario's Japanese name) is Aser E.T. backwards was replaced with a joke about Boo from Mario compared to Boo from Monsters, Inc.

Bugs Bunny Sprite Change

 * In the Japanese version, Bugs Bunny's sprite is based on Bugs' appearance in Tiny Toon Adventures, but the sprite was changed in america to be based on/promote Looney Tunes: Back in Action, all versions of the DS version used the Japanese sprite.

All About Topolino
Mickey Mouse is called Topolino in Italy, so many changes had to be made it can't fit on the regional name changes section.
 * "MCK" on the minigame score board is now "TPL"
 * Topolino is most well known for having eyebrows, so eyebrows were added to the sprite if you select the "Italian" language on PAL releases or any "Advanced Animation Edition".
 * The "cel name" for mickey was MICKEY, but the 6 character limit made Topolino TOPOLN.