Diddy Kong Racing Adventure

Diddy Kong Racing Adventure is a rejected pitch made by the Climax Group for a Diddy Kong Racing sequel on the Nintendo GameCube around 2004. . The project was never announced to the public in any capacity and only became known after an amateur video game archivist acquired the prototype and published a video about it in November 2016.

Plot
After his defeat in Diddy Kong Racing, Wizpig allied himself with the Kremlings to get his revenge. While Diddy Kong is away on a visit to Timber Island, the Kremlings have been kidnapping members of the Kong clan, Wizpig is in the process of converting Kongo Island into a gigantic raceway. Upon returning and seeing the Kremlings bulldoze the forest, Diddy Kong gathers the racers of the original Diddy Kong Racing to challenge Wizpig and stop his destruction of Kongo Island.

An earlier document had a similar plot, except for the role of Wizpig being instead filled by a new villain named "Wicked White Rhino Baron von Smorg".

Gameplay
Diddy Kong Racing Adventure would have an Adventure Mode like its predecessor. The pitch document promised any new features such as the ability to change vehicles mid-race, the ability to collect items to customize the vehicles and reach new areas , and special attack exclusice to each character.

To challenge the bosses, the player would either have to beat them in a preliminary heat or by collecting an item for the villain. The game would have featured non-racing events such as obstacle courses and stunt challenges.

Locations
The pitch document mentioned the game would feature 16 villages, each with three different courses. New locations planned for the game included:


 * Kong Familly village
 * Icy Peaks, featuring Candy Kong's ski chalet
 * Pirate Lagoon, featuring Funky Kong's surf resort.
 * The Rainforest
 * Kremling Construction Camp, featuring treetop walkways and an unfinished stadium
 * Kremco Industries
 * Krunch's den
 * Wizpig's Futuristic Raceway

Characters
Donkey Kong was going to be a playable character, unlocked after winning every race.