Bill was a talking pig character from The Mo Show who later becomes the fourth villain on the same show. He is cousins with Sam the Ham and another pig mentioned in On The Run.
The puppet's head was rebuilt in Season 4 Episode 5 of The Mo Show. Currently a villain (starting from S5 Ep5), he helps Timmy Goodman capture Jen in order to take down Mo Monster. On October 14, 2016, the character was updated with an eyelid mechanism in the mini series "On The Run" with Timmy Goodman.