List of Mario Kart: Double Dash!! pre-release and unused content

This is a list of pre-release and unused content for the game Mario Kart: Double Dash!!

Early iteration
The models of the characters are from Super Smash Bros Melee, and Mario and Luigi are seen in this trailer of a very early build of the game, driving separately, each in a simple, blue kart. It was originally called Mario Kart for Nintendo GameCube, and it is likely that this early build of Mario Kart: Double Dash!! was overhauled for the final game, as it resembles nothing like it.

Early builds
Several screenshots released during the development of the actual Double Dash build shows different textures, tracks, speedometer HUD, and racer mugshots.

Time trial code
Pressing         at the end of a trial mode race (where save ghost and replay are) will bring up a series of numbers and letters, a code that stores the race time, lap time, characters used, kart used and course I.D.. This was used for a Japanese contest.

Unused Data
Unused data has been found in a demo of Double Dash included in Interactive Multi-Game Demo Disc Version 13.

An icon and a trophy for a Reverse Cup have been found, which possibly could mean that a cup where the racers race the track backwards was planned. In addition, early character icons have been found featuring Donkey Kong Jr. instead of Diddy Kong.