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Real Identity: Not Applicable
Appearances: Two Parter: Part One and My Name is Jose
Powers/Skills: Various
Voiced By: Not Applicable

Kryptonite are remains of the planet Krypton where Superman was originally from. However, on Earth, they have special properties that can adversely affect Superman. Green Kryptonite can weaken and even kill Superman. Blue, green, and red Kryptonite are on display in the Hall of Justice. Gizmo had a supply of Kryptonite so Superman wouldn't bother him. After Raven gave herself Superman's powers, Gizmo blasted her with a Kryptonite ray from his floating fortress. She was too weak to use her magic to change their powers.