7) POWER-BOY
In 1956, Superboy discovered turnabout is entirely fair play when he met one Zarl Vorne, rocketed away from Earth by his Atlantean scientist father to avoid a cataclysmic death. Though the planet survived, Zarl landed on an asteroid named Juno, where his physiology gave him super-powers and he chose a super-identity much like The Boy Of Steel. Thrilled to have a peer in power, Superboy was crestfallen to discover that his presence drained Power-Boy’s abilities the same way Kryptonite drained Superboy’s own, forcing the caped pals to permanently part ways…