|Introduced In||The Lost Sword|
|Voiced by||Yuri Lowenthal|
Flint (full title: Flint the Mutant and sometimes spelled as Flinnt) appeared in the episode The Lost Sword where the story is focussed on him. He and Shake find a golden sword in the Cotton Candy Forest. Flint and his partner go on an advenure to find the sowrd's owner.
Flint is a mutant with a dark-green skin, he is pretty tall for a 15 year-old boy. He has black hair that reaches his ears and is a bit messy. He wears a brown hat with a paper on it. He wears a sand-colored jacket, a black belt, brown shorts, black shoes and wears a big square brown backpack. He always carries around a stick that has a hidden knife in it.
Flint is proficient in several forms of combat, including hand-to-hand combat and swordsmanship. He can jump very high and is exceptionally strong and agile for a boy of his age. Despite his age and appearance, Flint seems to be quite strong and athletic and even stronger than Finn. He was able to defeat the Ice King, Marceline and a horde of Banana Guards in a few minutes. He is shown to have other weapons in his backpack like: sticky bombs, grapple hook and a boomerang.
Shake is the best friend of Flint, he has been his pet-monkey since he was very young but they eventually became more of brothers instead of pet and owner. He and Shake always travel around in the world, explore things, help people and a lot of other things. He says he and Shake made a lot of friends on their travels, this was the first time they came to the Land of Ooo.
Princess Mint is the older sister of Flint who is the princess of the Mutant Kingdom that is located in another continent of the world, indicating that there are more continents besides the Land of Ooo. She was first believed to be his crush but it turned out to be his sister later on.
Finn & JakeEdit
Flint shows much respect for Finn and his brother Jake because they are the hero of the Land of Ooo. He trusts them and knows they will be there whenever he gets into trouble. Finn is indebted to Flint because he returned his Golden Sword that Finn lost after he used it to destroy the black hole.
Other inhibitans of the Land of OooEdit
Flint seems to have interacted well with other inhibitans of the Land of Ooo. He did became enemies with Ice King (and Gunter) because they tried to freeze him and Shake. Flame Princess is mean to Flint only because he reminds her of Finn, Marceline was acting very seductive to Flint, if this was to mess with him or real isn't known. PB and Lady Rainicorn first see them as intruders but afterwards realize they are real nice. LSP only doesn't seem to be interested in Flint or Shake.