Freakazoid never appered in the animated sries or comics but he is mentioned. They talk about his cartoon show. The first season of Freakazoid and first episode called dance of doom Batman makes a cameo "Only one hero can track Cave Guy only one hero has the heart to fight this fiend that hero is on another network thus we have no choice but to trun to this fellow a teenage nerd or is he" In one episode Freakazoid goes to a scince convention and meets  some fans that wan't to know if Superman will fight Fred Flintstone or if Superman will be in any Frekazoid episodes.