From The TV IV
I Am Weasel (1997–1999) is an animated comedy that ran on Cartoon Network. It started as a segments on Cow and Chicken before being given its own series. It's about an extremely intelligent weasel who only attempts to do good in the world and an impossibly stupid Baboon who makes it his life goal to somehow show up Weasel. Although these are the only two characters in the series initially, eventually the Red Guy (a red naked devil) begins to make regular appearances after guest starring several times in Cow and Chicken.
From 1997 through 1999, the show was only seen as segments on Cow and Chicken. In 1999, it was spun off into its own series, initially with compilation episodes made up entirely of segments that originally appeared on Cow and Chicken. A new season was then created of all new segments. It is unknown how the segments from Cow and Chicken were aired as part of the I Am Weasel series, so they are listed here by the airdate they originally appeared in the Cow and Chicken episodes.