I.R. Baboon

I.R. Baboon is the archenemy of I Am Weasel and often acts as the antagonist of the show, although he is not normally a malicious individual - instead he is a very unintelligent individual prone to bursts of bad temper and jealousy: he is determined to prove to the world (and possibly himself) that anything Weasel can do he can do better but as a result of his own stupidity or sheer bad luck his schemes backfire and can cause untold chaos.

Despite being a running nemesis of Weasel for the first two series I.R. Baboon was replaced somewhat as the main villain by The Red Guy from Cow and Chicken (the series "sister" show) - though Red Guy would often use I.R. Baboon's own stupidity and bad temper to cause mischief.