Magical Hat(1989)

Magical Hat is an animated series following Hat, a descendant of a legendary hero who once sealed away Devildom and defeated an evil king. When Hat accidentally tumbles into Devildom, he discovers he must confront the very darkness his ancestor vanquished. Stripped of his family's protection and thrust into a hostile realm, Hat must master his inherited powers and uncover the truth behind the ancient sealing to prevent the evil king's return. The series blends action and adventure as Hat navigates treacherous landscapes, encounters supernatural allies and enemies, and grapples with the weight of his bloodline's destiny. With danger lurking at every turn, Hat's journey becomes a race against time to save both Devildom and the world above from catastrophic destruction.