List of Mario Kart Tour pre-release and unused content
From the Super Mario Wiki
This is a list of pre-release and unused content for Mario Kart Tour.
On April 23, 2019, Nintendo opened applications for participating in a closed beta test of Mario Kart Tour to Android users in North America and Japan, which began on May 22, 2019 and ended on June 4, 2019. The following lists the features included in the beta version of the game. Several of the characters, karts, and gliders listed were not made available in the final game at launch.
Most of the characters retain their special items in the final game; however, Baby Peach, Baby Daisy, Baby Rosalina, and Lemmy's special items are replaced by the Bubble, Morton's special item is replaced by the Giant Banana, Larry's special item is replaced by the Boomerang Flower, King Boo's special item is replaced by the Lucky 7, and Ludwig's and Rosalina's special item is replaced by the Dash Ring. Additionally, in the beta, both Rosalina and King Boo were classified as High-End characters, whereas in the final version, they are classified as Super characters instead.
The beta only featured one tour, named Beta Test.
Most of the karts retain their rarities in the final; however, in the beta, the Soda Jet and Super Blooper were both classified as Normal karts, and the Blue Seven was classified as a High-End kart, whereas in the final, they are all classified as Super karts. The Koopa Dasher had a sprite used in the beta with Pipe Frame tires equipped instead of the tires the Turbo Yoshi had. The Egg 1 and Bolt Buggy also have not yet been added to Mario Kart Tour.
None of the gliders' rarities changed from the beta to the final game.
After Red Koopa (Freerunning) was added in the London Tour, there was an additional texture set for the Green Koopa.
Some karts have specific files for their positions on certain karts. Most of these karts are in the game, but there are references to several unused karts, including the Mario Kart 8 appearance of the Blue Falcon (BFalcon8) and the Cat Cruiser (CatC). Additionally, a model of the Green Kiddie Kart with a red and blue color-scheme resembling Mario's overalls can also be found.
Several text strings referencing objects of tracks not in the game can be found in the files.
When the Para-Wing was added in the London Tour, a sprite was added in the files which appears to be identical to the kart, except with different tires being equipped, instead being the new tires seemingly based off of those of the Pipe Frame, which were also used by the Koopa Dasher.
Some unused icons know as BoostItem, ItemExchange, PartsScoreUp and PartsSkillUp can be found in the game's files. The BoostItem icons also have icons of them on a ticket.