About this game
Yume Kojo: Doki Doki Panic (1987) is a Famicom Disk System action platformer developed by Nintendo, created in partnership with Fuji Television as a promotional game for the broadcaster's Yume Kojo '87 summer exhibition. The game introduced a lifting-and-throwing combat system, four playable characters with distinct abilities, and a vertical world design unlike Super Mario Bros. Nintendo of America later reskinned the game with Mario characters and released it as Super Mario Bros. 2 — one of the most extraordinary franchise transformations in gaming history.
Key Features
The game's core mechanic — lifting enemies and objects from the ground and throwing them at opponents — was a fundamental departure from the jump-on-enemies design of Super Mario Bros. Four playable characters each bring different strengths: balanced Imajin, float-jumping Lina, high-jumping Mama, and powerful-lifting Papa. Stages scroll both horizontally and vertically, with a final goal of reaching Mamu (a giant frog king) at the end of each world. Unlike Super Mario Bros., the game does not use a timer — pacing is determined by exploration.
The Story Behind
Doki Doki Panic began as a tech demo with vertical-scrolling mechanics; Shigeru Miyamoto joined the project and directed developer Kensuke Tanabe to make it 'a little bit more Mario-like.' The result was a game with Mario's visual language but an entirely different set of mechanics. After its July 1987 Japanese release, Nintendo of America — searching for a Super Mario sequel that was accessible enough for Western audiences who had been denied the original Japanese SMB2 — selected Doki Doki Panic, replaced its four original characters with Mario, Luigi, Princess Peach, and Toad, and released it as Super Mario Bros. 2 in 1988. The float-jump (Peach), high-jump (Luigi), and lifting power (Toad) traits that Western players associate with those characters to this day were originally designed for Lina, Mama, and Papa.
Tricks & Tales
The four playable characters — Imajin, Papa, Mama, and Lina — are the mascots created by Fuji Television for the Yume Kojo '87 summer exhibition event. The game was initially a promotional advergame; the fact that its mechanics became the foundation of Mario's Western legacy is one of the most unexpected outcomes in gaming history. When Nintendo of America converted the game to Super Mario Bros. 2, Koji Kondo updated the music: most tracks received better percussion and pitch adjustments, and a new title theme was composed. The original Doki Doki Panic characters were never reused in any subsequent Nintendo game.
Collector's Guide
Region & Compatibility
Doki Doki Panic was a Japan-exclusive Famicom Disk System game — never officially released outside Japan in its original form. The game's mechanics lived on globally through Super Mario Bros. 2 (NES, North America/Europe, 1988) and later through Super Mario USA (Famicom, Japan, 1992), which returned the Mario-branded version to Japan.
Maintenance Tips
As with all Famicom Disk System software, the disk drive belt must be inspected on original hardware — most surviving FDS units require belt replacement to read disks reliably. The magnetic FDS disk can develop data errors; handle with clean hands and store away from magnets. The Doki Doki Panic disk packaging and label are distinctive and in good condition add significant collector value.
Available in our shop
Hand-cleaned and tested units shipped worldwide from Toyohashi, Japan. HP direct purchase exclusive: we include a printed shop owner's note card with every order.
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