CuBot

CuBots, also referred to as Cubots, are enemies who were supposed to appear commonly in Super Smash Flash 2's scrapped Adventure mode, The Flash Of Shadows.

In the story, CuBots were Umbra's minions, and came in three different types each with different attacks, although overall with the same role in the story. They were planned to appear in multiple levels throughout the mode, including during the last boss fight, against Umbra himself.

Trivia

 * Although the CuBots were a known feature since the Adventure mode's reveal, their design only got released to the public in an April Fools 2020 video.
 * In that same video, they received a redesign to match the new sprite style SSF2 developed after The Flash Of Shadow's cancellation. The new design is a mixture of the three cubot types that existed previously.