Prototype Koba is an orange wIthered bunny. His puppet Is K-Trap, who rides on his shoulder.
Prototype Koba appears in FNAG 2: Remastered.
Prototype Koba will crawl in the vent shaft until he reaches the cover behind the player.
When the player spots him in the vent spot behind him, they must close the cover on him, as the mask will not fool Koba.
If the player fails to close the vent door, Koba will jumpscare them, resulting in a game over screen and the player being sent back to the main menu screen.