The character Crinkly Wrinkly appears dressed as Finn from Adventure Time while heading to an "Ooold Folks Home".
Although the sentient Jethro vows to never leave his "brothers," Boxman eventually finds and removes him, though the other Jethros continue to cover for him. Production Context [S2E30] I Am Jethro
In of OK K.O.! Let’s Be Heroes , titled " I Am Jethro ," the story shifts focus to a unique version of Lord Boxman’s standard robot, Jethro. Core Plot & Character Development The character Crinkly Wrinkly appears dressed as Finn