The New Batman Adventures (1997)

S1E8 Growing Pains

Title: Growing Pains Plot: Robin must safeguard a young girl suffering from amnesia, who is being pursued by her "father," revealed to be Clayface. This shapeshifter crafted the girl from his own substance to explore the city, but now he plans to reclaim her by reabsorbing her into himself. As Robin races against time, he must unravel the mystery of the girl's origins and thwart Clayface's sinister intentions to keep her safe.