Other mistake: Two Face's lips on the left side are a shade of pink instead of dark red and his coin's all rough looking on the edge.
Batman: The Animated Series (1992)
1 mistake in Almost Got 'Im
Starring: Mark Hamill, Kevin Conroy, Efrem Zimbalist Jr., Loren Lester, Bob Hastings
Genres: Action, Animated, Crime, Drama, Family, Fantasy, Mystery
Answer: Because he stole a chemical from his lab.
But Batman knew that with it, Clayface could permanently retain his shape and Clayface desperately wanted to be Matt Hagen again. In a sense, Batman stopped Clayface from becoming human.