Here Comes the Grump (1969)

A hapless character known as the Grump has cast a spell of despair across the kingdom, leaving its inhabitants in perpetual gloom. To restore joy, Princess Dawn, her loyal canine sidekick Blip, and a spirited boy named Terry embark on an adventurous quest to locate the elusive Crystal Key, the only object powerful enough to lift the curse. Together, they navigate a whimsical world filled with challenges and surprises, determined to bring light back to their home and overcome the Grump's mischief.