Name: The Kryptonite Man
First Appearance: Superboy (vol. 1) #83 (Sep. 1960): "The Dreams of Doom"
Super? (Has Super Powers/Special Abilities/Technology): Yes
Number of Appearances: 4
Enemy of: Superboy
Note: teen criminal alien
The original "Kryptonite Man" was a teenaged alien criminal who was flying through space when he passed through a Kryptonite cloud. This gave him the properties of Kryptonite, powers which allowed him to battle Superboy.
Suggested links for further research about this character and the character's religious affiliation: