Peppermint Butler underwent a transformation into a younger, less experienced version of himself named Pep But after a confrontation with dark magic.
In the “Adventure Time” series, Peppermint Butler is known for his dark magic affinity and his service to Princess Bubblegum as her loyal butler. However, his character takes a significant turn in the series finale and the subsequent “Adventure Time: Distant Lands” specials. During the events of the series finale, “Come Along With Me,” Peppermint Butler is caught in the crossfire of GOLB’s chaotic magic, which results in him being “digested” by GOLB and later regurgitated. This process strips him of his dark magic knowledge and experience, effectively reverting him to a child-like state, both physically and mentally.
This younger version of Peppermint Butler, now going by the name Pep But, is essentially a new character with little to no memory of his past self. He retains his basic personality traits but lacks the dark wisdom and connections he once had. In the “Distant Lands” special titled “Wizard City,” Pep But enrolls in a magic school to relearn magic and attempts to regain his former abilities. Throughout the special, he faces the challenges of being a novice in the magical arts and the stigma associated with his past identity as a practitioner of dark magic. Despite these obstacles, Pep But is determined to become a great wizard and make new friends along the way, showcasing his resilience and adaptability despite the drastic changes he has undergone.