Diskun was the mascot for the Famicom Disk System in Japan. He appeared on the top left of every Famicom Disk System manual and was yellow just like the Famicom Disk System disks. Nintendo once held a Famicom Grand Prix: F-1 Race contest in which the players with the highest scores would receive a Super Mario Bros. Game & Watch game in a Diskun shaped container.
Smash Table Tennis
Family Computer Golf: Japan Course & Family Computer Golf: U. S. Course
Diskun appears on the uniforms of the Ice Hockey characters in the manual and Famicom game cover.
Nakayama Miho No Tokimeki High School
Diskun appears on a note in Nakayama Miho No Tokimeki High School.
Famimaga Disk Vol. 6: Janken Disk Jo
Diskun was a main character in the Janken Disk Jō, based on the Diskun mangas seen in every Famimaga magazines.
Super Smash Bros. series
"This little guy is the adorable mascot for a Nintendo Entertainment System peripheral device released in 1985. Using the disk system, you could rewrite games for 500 yen, an epochal and economical feature. Funnily enough, the instruction booklet was sold separately for 100 yen. The disk system's first game was The Legend of Zelda."
Animal Crossing: Happy Home Designer
Diskun along with a Disk Writer made a possible appearance in Animal Crossing: Happy Home Designer.
A rock star in the Power Chord minigame has a Diskun tattoo on his or her right arm. Diskun also appeared in a poster in 9-Volt's room during the intro.
WarioWare: Smooth Moves!
Once again, Diskun also appeared in a poster, this time in 9-Volt's and 18-Volt's stages.
Streetpass Mii Plaza
A Diskun hat can be purchased with a Plaza ticket in StreetPass Mii Plaza.
Super Mario Maker
Diskun appears as a Mystery Mushroom costume in Super Mario Maker. Pressing up plays the Famicom Disk System disk insert sound. Diskun, along with other costumes, are removed in the 3DS version.