Prince Gumball
Prince Gumball (Full name: Bubba Gumball and previously known as (Prince Blowpop)) is the male version of Princess Bubblegum originally created by current series designer Natasha Allegri. After the gender-swapped characters were introduced in series of drawings and comics, they were featured in the season 3 episode "Fionna and Cake." The episode, and the other Fionna and cake episodes in Adventure Time, were all fanfictions, however, told by characters of the show, (mostly the ice king) and were not canon to the Fionna and Cake Universe. In the new Fionna and Cake sequel show, he is now a human (as all the other characters are as well) and he met Marshall Lee. The two quickly hit it off and became a couple. They are dating.