Donald in Maui Mallard, known as Maui Mallard in Cold Shadow in North America, is a platform game released in 1995 for the Mega Drive, in 1996 for the Super NES and PC, and in 1998 for the Game Boy. It was developed and released by Disney Interactive for the Mega Drive, with Eurocom and Bonsai Entertainment developing the SNES and Game Boy versions afterwards. Despite being the original, the Mega Drive version was only released in Europe and Brazil and never saw a North American Sega Genesis version due to Nintendo securing an exclusive publishing contract for the game in North America, but the Mega Drive version did see an American release but only as a Sega Channel exclusive. The game was one of the first games to be released under the Disney Interactive label.

The game stars Donald Duck under the identity of an anthropomorphic duck detective named Maui Mallard, who adopts the name "Cold Shadow" when he dresses up in ninja garb. For the North American versions of the game, all Donald Duck references are omitted for unknown reasons and the main character is only known as Maui Mallard. Though the end of the game informed the player to look forward to Maui's next adventure, there have been no other appearances of Maui Mallard or Cold Shadow in any medium.

Besides typical platform game gameplay (running around, jumping from platform to platform), one of the game's most distinctive gameplay features is allowing to switch the player character's form to suit one's needs. The player begins the game as Maui, whose only mean of self-defence is an insect-launching pistol that can launch several forms of bugs, some of them combined for greater effect. However, once the player reaches the second level, Maui transforms into Cold Shadow, his ninja alter ego, who defends himself with short-range attacks using a staff. Cold Shadow's staff is also primarily used to explore the level further, such as climbing a narrow tunnel. After the second level, the player can switch back and forth between Maui and Cold Shadow at will, provided he has enough ninja tokens for the transformation. The amount of ninja tokens Maui or Cold Shadow holds determines Cold Shadow's strength — who can then chain more and more attacks as his skill improves — when played as him in the SNES version. On Genesis, however, Maui needs to collect red ninja tokens instead, the amount of white tokens being useful for metamorphosis alone. Some levels of the game, however, prevent Maui from transforming at all, as Cold Shadow cannot bungee jump on vines, for example, which forces the player to use Maui throughout the level.

It should also be noted that the 1996 PC version was an upgrade of the Genesis version. All tracks of Michael Giacchino's score had been fully orchestrated by Steve Duckworth, it had updated graphics and a few level enhancements (such as the straw plugs in Muddrake Mayhem).