Gus Crummly
Only appearing in Captain Marvel Adventures #133. The neighbourhood loafer. When Billy moves into a new home he meets Gus, who pushes past him. He transforms to Captain Marvel. To escape, Gus sets fire to the clothes line Ma Potter is putting clothes on. Cap saves her and a boy uses a gun that fires a pellet that gives off foam and puts out the flame. The boy introduces himself as Dexter Knox, and says he likes inventing things. Cap becomes Billy Batson to make friends with Dexter, who reveals his parents are poor and the device will make money. He reveals who the thug from before was. They decide to get the gun patented. When they go into the shed they meet Gus, who knocks out, then binds and gags the two. He reveals he started the fire to see how the gun worked, and wants to make money himself. He sprays a pellet at both of their faces to suffocate them. But Dexter uses his feet to activate the helical fan he made, which blows away the foam. Billy then removes his gag on the fan, transforms, and frees Dexter, asking where Gus lives. Dexter goes outside to show him, but sees his house is on fire. When the firemen come, the villain says he will put it out with his Quench Gun, but Cap knocks him out, realising he started the fire to show the gun. The real inventor puts it out. Gus goes to jail and the fire department will apparently pay well for the gun. That night at Haven House Billy feels he will like this neighbourhood.
Read more about this topic: List Of Marvel Family Enemies