Justice League Action Shorts Ep 13 - M2F Transformation

Episode 13 True Colors
On Metropolis, Superman has a face off with Metallo. The Man of Steel has the upper hand until Metallo opens his armor's chest's cavity where he keeps a piece of Kryptonite. Superman feels instantly weaker. Firestorm turns up and tries to help by altering Kryptonite's chemical makeup. All he manages to do, though, is turning the Green Kryptonite into different kinds of Kryptonite which have different effects on Superman: Red makes him mad, Golden depowers him, Black creates an evil duplicate, Pink turns him into a woman... until Firestorm remembers he wrote the formula for Green Kryptonite on his wrist and transmutes the Kryptonite into a block of lead. Unable to bear the weight of a chunk of lead located on his chest, Metallo falls down and Superman takes him away. He asks Firestorm not to tell Batman about this incident, but Firestorm has already sent the Caped Crusader a text.