Explaining Red X as Jason Todd theory.
There's a lot of mystery surrounding the Teen Titans original character's identity. By far one of the most popular theories is Jason Todd is Red X.
Teen Titans: X - Page 25 by pinku on DeviantArt
In Teen Titans, who became the next Red X , it wasn't Grayson
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Who is Red X from the Teen Titans TV show? - Quora
Teen Titans: X - Page 17 by pinku on DeviantArt
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Which who is red x theory do you think makes more sense? : r
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Why do many fans think Red X is Jason Todd? - Quora