|Introduced In||Fionna and Cake|
|Voiced By|| Neil Patrick Harris
Prince Gumball is the gender-swapped of Princess Bubblegum. They only exist in Ice King's Fanfiction. Prince Gumball have similarities like PB, he has a crush on Fionna like PB has a crush on Finn. Like PB he has a trusty steed, Lord Monochromicorn.