In Gravity Falls, Li'l Gideon seemed to truly feel that if he won't be able to have Mabel, nobody can. Detlef made a further appearance in the third-time finale "Li'l Sebastian", where Tom and Jean-Ralphio employed him to do the job for their new amusement corporation, Entertainment 720. His only task was to shoot basketballs about the place of work Detlef experimented with providing them organization assistance, but they disregarded it.