Don-chan is the main character of the Taiko no Tatsujin series, and appears as a default playable character in Mario Kart Arcade GP DX. He additionally appears in Super Smash Bros. for Nintendo 3DS / Wii U as one of the characters that Pac-Man can randomly summon during his Namco Roulette taunt.
As a nod to his appearance in the Mario Kart Arcade games, Don-chan is a playable character in Mario Kart D's DLC Pack 1, returning alongside Pac-Man and several courses from the arcade titles. Two of Don-chan's recolors are based off of Strawberry and Hero Don-chan, Mario Kart Arcade GP DX palette swaps.
Don-chan makes a minor cameo appearance in Jake's Super Smash Bros. as one of the many Namco characters present as part of PAC-MAN's Final Smash, Namco Tussle. Don-chan himself doesn't make a major appearance in the short cinematic that plays should PAC-MAN successfully initiate his Final Smash, but does appear alongside Mappy, Tower of Druaga's Gil, Bravoman, Drill Dozer's Pooka and Frygar, Libble Rabble's Topcup, Yōkai Dōchūki's Tarosuke, and Valkyrie at the end of the cinematic, as Amul launches the trapped foes away. Notably, Don-chan is the only character in this cinematic who is not from a "classic" Namco title and does not appear as a pixellated sprite.
He's one of the victims of the Kirthar's Snap Finger.