GrottoRed is the first boss encountered by the player in An Untitled Story.

GrottoRed is a bipedal red creature that is found sleeping in Grotto, and wakes up when the player drops down into his room. His attacks consist solely of jumping back and forth on the platform he is on, while shooting a fireball along the ground at the same time in all modes except Simple. The player must jump between him and the fireball when he lands to avoid getting hurt.