After a number of unsuccessful conflicts with the Teen Titans (and Superman in "Adventures of Superman" #430) Gizmo went straight for a while, and took a job at S.T.A.R. Labs, until his former Fearsome Five teammate Psimon, after having been seemingly killed by his teammates, resurfaced looking for revenge, and shrank Gizmo to microscopic size. Years later, Gizmo found a way to revert to his normal size, and took up a life of crime once again, partnering with his former teammate, Mammoth.