Yenndo is very similar to Funtime Freddy's endoskeleton with complete lack of a suit-shell, to reveal very detailed endoskeleton wirings, somewhat resembling human muscle layers, although, he has four small differences - a lack of inner face-plates, both hands, while lacking a hand-puppet, eyes spaced out slightly further apart, and yellow irises, rather than Funtime Freddy's blue. If observed closely, his nose looks different compared to Funtime Freddy's, being slightly flatter. 