The Adventures of Superboy S02 E03 The Chameleon Creature

Clark, Lana, and her father are on a safari in Africa where they spot an incredibly rare white ape. Soon they learn that the white creature can change its shape. It kidnaps Lana, but she is rescues by Superboy. In the end, the discover that the creature is a white ape. It can change its shape because it was exposed to a mysterious purple gas.