Wo is recycled from the season 2 Mo.
He's also the first villain in The Mo Movie: Mo vs. Wo.
He hates Mo because he's jealous that he has his own family sitcom, which he has always wanted. Wo has tried stealing shows before, which makes him a wanted criminal.In Season 4 Episode 3 Wo made his last appearance of 2014, as seen when he got defeated by The Teenage Mo-tant Ninja Monsters (A parody of Teenage Mutant Ninja Turtles). Wo almost looks just like Mo Monster, exept for the eybrows and the black jacket. After a 1 year absence, Wo returns to S5 EP3, a Star Wars episode along with Timmy Goodman with new eyes and eyelids hearing aids and a cane.