Jello is a lime green jelly with pineapple chunks. "Her " first apperance was when the monsters had a party and Susan's ( or Ginormica's ) parents house ( leaving all the guests freaked out ). B.O.B was seen talking ( flirting ) with Jello. Then at the end of the movie B.O.B says to Derek how he does not need him for now he has Jello. In the tv show he breaks up with her.