Gizmo (because that's his name)
Gizmo T. Dog (the T stands for The)
Mr. G.T. Dog
Mr. Mo
Gizmaniac
Gizmonster
Abysmo
Gizmonic Plague
The Gizster
Gizmania
Gizmopolis
Hairbag
Herr Bag
The Amazing El Doggo
The Canine Commando
His Honor The Dog
The Dog
That
Gizaster
The Master of Gizaster
Master of All He Surveys
Hey, Beagle
Gizzie (Just the vet calls him that)
