Okage Shadow King

Okage: Shadow King, known in Japan as Boku to Maō (ボクと魔王 Boku to Maō?, literally "Me and the Devil King"), is a role-playing video game developed by Zener Works and co-developed and published by Sony Computer Entertainment. It was released on March 15, 2001 in Japan, and October 3, 2001 in North America, exclusively for the PlayStation 2.

On the back of the box, the description is:"In an unexpected twist of fate, the spirit of an evil king is unleashed and possesses the shadow of an innocent young boy, named Ari. Wielding the burden of the evil ghostly being, Ari and his friends must journey across a wonderfully animated, whimsical world. In this struggle between good and evil, light and dark, manage your team carefully or forever be held captive by the evil king's spirit."

Trivia

 * On June 29th, 2015, Sony Computer Entertainment registered a new trademark for " Boku to Maou" in classification 9. Class 9 is used for video games, so fans are speculating a sequel or remake is in the works.