Spring Bonnie Into The Pit Game. Those red fangs are the inside of his mouth. Spring bonnie manages to bite into oswald's arm with his unhinged jaw and fangs, drawing a lot of blood from oswald, who hits the animatronic to free himself.
In the graphic novels, probably a demon in a suit, in the original story, probably an endoskeleton using an illusion disk (since he can turn into oswalds dad.) eleanor’s first. Into the pit is a sprite based game made for the 10th anniversary of the five nights at freddy’s series, adapting the story of the same name, into the pit.
Spring Bonnie Into The Pit Game Images References :