
He also has a connection to Marceline’s dad, Hunson Abadeer, as the two are shown to have once played golf together when Finn and Jake travel to the Nightosphere.

Since then, we’ve watched him use dark magic a number of times, even turning Peace Master’s kids into demon birds. We first get a hint of this in “Death in Bloom,” where Peps' relationship with Death himself saves Finn and Jake. Most of Peps’ shady past is only revealed to the audience, with Bubblegum and the rest of the Candy Kingdom completely unaware of his macabre proclivities-though one of the Gumball Guardians does dub him "Dark One," meaning the beings are likely aware of his secret powers. Beneath his candy stripes and coattails, however, lurks a being much more dastardly than the nickname Pep-But would imply.

When we first meet Peppermint "Dark One" Butler, he’s the loyal and somewhat sassy servant of Princess Bubblegum.
