Gizmo is a villain in the DC universe and is a recurring enemy to the Teen Titans.
Gizmo Mikron O'Jeneus is a bald dwarf. He is a very skilled and powerful inventor who can turn any harmless machine into a weapon. He is a frequent member of the Fearsome Five and enemy of the Teen Titans. He used to work and S.T.A.R. Labs. He is usually partners with Mammoth and sometimes works with the H.I.V.E. When the Fearsome Five returned his was killed by Doctor Sivana
A second Gizmo appeared later appeared in the comics. This one however is based off his Teen Titans appearance as a young boy. He is later revealed to be the son of the original Gizmo. After graduating from the H.I.V.E. academy young Gizmo later joined the Cyborg Revenge Squad. Later he along with his other Fearsome Five members were later recruited by the Secret Society of Super Villains.