These aliens never appraed in the ultimate alien intro Fasttrack, Chamalien,Clockwork,Jury rigg,Shocksquatch,Eatle,Peark Upchuck ,Feedback,Ultimate Wildmutt,Ultimate Way Big,Squidstrictor,Rocks and Eon.
Feedback was not invented until Omniverse, and Upchuck was thought to be one species even by the writers at the time. Squidstrictor and Rocks do not exist. As for the rest of those aliens, they did not exist at the beginning of the series. The Ultimate Alien intro stayed the same from the beginning of the show, so none of these guys got incorporated later on.