OriginEditJunior Happy is Mr. Happy's son. His Grandpa is Mr. Sad and his Grandma is Mrs. Mad. His great Grandpa is Grandpa Happy. He looks just like Mr. Happy, but he has a rainbow propeller hat and he tawks wike dis.
One day, Mr. Happy wished for a son. He randomly and creepily got pregnant. A few panels later, Junior Happy was born.