Kirby's Biggest Case

Kirby's Biggest Case (Kirbys Grösster Fall) is a 32-page, German-language comic book story published in Germany in a 1996 issue of the magazine Club Nintendo. This magazine is not to be confused with the separate Club Nintendo magazine published in Mexico and Latin America, or Nintendo's defunct international customer rewards service, which was also called Club Nintendo. The comic was written and drawn by Claude M. Moyse, and takes very heavy liberties with its source material.

A parody of the noir fiction genre, the story portrays Kirby as a detective in a real-world setting outside of Dream Land, populated by both humans and Kirby series characters. King Dedede takes the role of Kirby's assistant. Kirby wears clothes and sunglasses through part of the comic, and is even shown smoking a cigarette in one panel, with a bottle of hard liquor and a shot glass on his desk. He also speaks an English swear word while falling down a cliff, in likely the only instance of vulgar language ever being used in official Nintendo media featuring Kirby. There are suggestive depictions of human female characters, and raunchy humor, such as when Kirby accidentally barges into a women's bathroom. The overall tone is dramatically out of character with any other official portrayal of Kirby.

The light-hearted mystery story centers around the supposed disappearance of Dr. Mainhold, a comic-original human character who creates a machine that allows video game characters to travel into the real world and back. It is suggested that this is how the Kirby series characters were able to enter the setting. Among various other comic-original characters is Susie, a female pink puffball wearing high heels, who is implied to be Kirby's wife. Certain pages of the comic serve as advertisements for Kirby's Dream Course, Kirby's Ghost Trap (the European title of Kirby's Avalanche), and Kirby's Block Ball. Screenshots of all three games are used. Rick, Coo, Kine, Mr. Bright, Sword Knight, Lolo and Lala also make appearances, along with two large devices that closely resemble a Nintendo 64 and Game Boy.

According to a German-language online interview with the author, Moyse disliked Masahiro Sakurai for unspecified reasons, and sought to get back at him through the comic by "turning Kirby into a freak." However, due to the joking nature of the interview, it is unknown whether Moyse was being entirely serious in making these statements.