I.R. Baboon (I.R. or Baboon for short) is the deuteragonist of the series. He is the exact opposite of Weasel who he is always trying to top in order to be better than him. He is a baboon who is unintelligent, jealous, ugly, willing to sniff his finger half of the time, and has no talent at most things. I.R. is in possession of a bright red butt that he never wears pants to cover, and therefore is ridiculed for it. He is often depicted doing the opposite of what most would consider sensible. As Weasel has good luck, I.R. seems to have bad luck: for instance, when he was about to get married, his bride fell in love with someone else and left him standing at the altar. I.R. is also the adoptive father of Grampa, a baby who was left on his doorstep in the episode "I.R. Mommy" and I.R. named i