Super Mario 64 Plus

Changes

 * Rumble features were added.
 * BLJ patched out.
 * "So long, King bowser" was changed to "Buh-bye" due to the localizers mishearing it as "So long, Gay bowser".
 * Luigi mode added.
 * After you beat the game, you can return to the title screen, and Luigi mode has been unlocked.

Luigi Mode

 * Luigi jumps higher.
 * Bob-omb Battlefield is now a fall stage.
 * Luigi uses pitched up Mario voice clips.
 * Several Whomp's Fortress areas were modified to suit Luigi's higher jumps.
 * You only have half of the HP meter at start, although you can refill it to full with coins.

Trivia

 * This was originally planned to release Christmas 1996, but due to production issues, was pushed to Christmas 1997.