In Gravity Falls, Li'l Gideon seemed to experience that if he won't be able to have Mabel, no person can. Detlef produced one more appearance in the 3rd-time finale "Li'l Sebastian", where Tom and Jean-Ralphio hired him to function for their new entertainment company, Entertainment 720. His only job was to shoot basketballs all over the place of work Detlef tried using offering them enterprise guidance, but they disregarded it.