Bizarro Supergirl was created by Bizarro, Jr. when Supergirl was working on a chemical project that exploded and changed Bizarro, Jr. into Bizarro form. He flew through The Fortress Of Solitude and tinkered with the Duplication Ray and hit Supergirl with it, creating Bizarro Supergirl. Bizarro Supergirl then took Bizarro Jr. away, and did not return him. In The Fortress of Bizarro, Bizarro saw his son. After he came to earth Bizarro declared war on Earth and went home to get his army, during which time Superman invented blue Kryptonite. Superman defeated Bizarro Jr. and Bizarro left the Earth as Superman and Supergirl went home. During their trip home, they found Bizarro Supergirl dead from Blue Kryptonite exposure. Bizarro, Bizarro Jr., and Bizarro Lois Lane are her relatives.
- This version of Bizarro Supergirl (Earth-One), including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 3 Appearances of Bizarro Supergirl (Earth-One)
- 1 Images featuring Bizarro Supergirl (Earth-One)
- Quotations by or about Bizarro Supergirl (Earth-One)
- Character Gallery: Bizarro Supergirl (Earth-One)
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This character is or was primarily an enemy of Superman in any of his various incarnations, or members of the Superman Family. This template will categorize articles that include it into the "Superman Villains category."
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