Power Rangers Wild Force

Zen-Aku, the strange wolf creature, is still confused about his identity. Seeking revenge against the Rangers, he is puzzled by his apparently human tendencies when he rescues a wolf pup. During a lunar eclipse, Zen-Aku suddenly transforms to his real human form -- that of Merrick, a powerful warrior. Merrick explains to the Rangers that 3,000 years ago, he put on the wolf mask to defeat Master Org, but was then cursed to become Zen-Aku. Trying to set things straight, Merrick sets off to face Master Org, but he meets up with Nayzor and the Quadra Org as well.