Mr. Garrison
Although these elements were established in "Cartman Gets an Anal Probe" and the "Spirit of Christmas" precursor cartoons, "Weight Gain 4000" further pushed the conventions of television, and especially of animated television entertainment. In addition to a continued stream of profanities and the promiscuous activities of Chef, an elementary school employee, the episode presents the character of Mr. Garrison as more and more unhinged. Although entrusted with the care of an elementary school class, Mr. Garrison demonstrates a questionable gender identity, poor teaching and unusual relationship with his Mr. Hat hand puppet.