A level based on the Kirby series was originally planned to appear in Adventure mode for Super Smash Flash 2. It was initially revealed in the fourth Smash Flash DOJO!!! prior to its fifth renovation, but along with Adventure, its current fate is a mystery. The name of this level has not been revealed.
The level itself has never existed, nor has it ever been properly made to be playable in the game. The sole image revealed was a purported image created by developers to exemplify how Adventure mode would have looked in SSF2. This was a common practice for developers for still-uncoded game modes. The aforementioned image shows Kirby exploring the level as he is approached by a Waddle Dee and a Bronto Burt, whom have been given a recolor to match the coloration of Kirby.