Fire Lion is (hence the name) a lion coated in flames and is a mini-boss that has thus far appeared in three games in the Kirby series, Kirby's Adventure and its remake, Kirby: Nightmare in Dream Land, and later in Kirby Super Star Ultra.
Fire Lion attacks by charging at Kirby in a stream of fire, and also by grabbing Kirby and scratching him, or trying to pounce on him. When Fire Lion pounces, a star will appear, allowing Kirby to inhale and spit it back at Fire Lion, inflicting damage.
Fire Lion was extremely dangerous and aggressive in terms of attacking in Kirby's Adventure but has died down in its aggression over the years. In its original appearance, it looked very nonthreatening and kitty-like, but later appearances drop the cute look in favor of a demonic appearance with a flaming yellow and red mane, and flaming eyes with no pupils.
- In the Mario game Super Paper Mario, there is a tournament of which the challengers are samurai-like beings known as "Sammer Guys", each one's name referring to a thing in a Nintendo series (most often the Mario series). One of those Sammer Guys is called Molten Panther, possibly a reference to the Fire Lion.
- In Kirby's Adventure, Fire Lion's artwork and in-game sprite depicts him as a seemingly normal lion with blue fur and saber teeth.