In "Sugar Berry Fever", he is among the Mao Clan ancestors-including Great-Great Aunt Blackbeard and Great-Great Paternal Grandfather Twig-who appear to condemn Mao Mao for loving cobbler in defiance of The Hero's Code. His appearance surprises Mao Mao, as he was unaware of his uncle's apparent death. Later, Jim Jim and the other appear again when Mao Mao has unlocked his Golden Truth form, but Mao Mao defiantly shoves some cobbler into Jim Jim's face. Jim Jim, initially shocked, then comments that the cobbler actually tastes good, before he and the other spirits disappear.
- It is not mentioned whether Jim Jim is the brother of Shin Mao, the brother of Mao Mao's Mother, or is related to them by other means.
- It is possible that Jim Jim died and became a spirit without Mao Mao knowing.