Although the series is "free-standing," ongoing artistic influences can be inferred from the ways certain characters were drawn for animation. For example, the character Birdie shares certain aspects of grooming and costume with Eliza Thornberry, and the rendition and bearing of the Hamburglar, reminiscent of Darwin and of Chuckie Finster, may have been an influence on the design of Otto Rocket. Elements of early K-C "house style" are also very evident on other supporting characters like Sundae the dog and the Chicken McNuggets. Co-protagonist Tika, however, is a very normal looking human girl of color. Iam Hungry appeared in one part of the episode "Visitors From Outer Space." Also, Mayor McCheese made an appearance in the final two episodes.