King K. Rool is a playable character in the fighting video game, M.U.G.E.N Trilogy. He was confirmed along with the other characters who appear in Super Smash Bros. Ultimate on December 14, 2018.
King K. Rool is the leader of the Kremling Krew, and King of the Kremlings. King K. Rool, like his spiritual predecessor Bowser, is a sinister, boisterous, overweight reptile who antagonizes Donkey Kong, much like how Bowser antagonizes DK's former rival Mario. However, while Bowser is a turtle-like chimeric monster who has frequently wavered between friend and foe for the Mario Bros. and is respectful towards his minions, K. Rool is an anthropomorphic crocodile, is consistently presented as a threat to the Kong family's safety and way of life, and mistreats and berates his minions.
K. Rool is the main antagonist of most games in the Donkey Kong series and the archenemy of Donkey Kong and Diddy Kong, making his debut in Donkey Kong Country as the final boss. In that game, he steals Donkey Kong and Diddy Kong's banana hoard for unknown reasons, but two official reasons given are either that he likes bananas, or he's stealing them in order to starve Donkey Kong and Diddy Kong and occupy their treehouse. He made his return again in Donkey Kong Country 2: Diddy's Kong Quest as pirate captain "Kaptain K. Rool", where he kidnaps Donkey Kong and demands the Kongs' banana hoard for ransom, but Diddy Kong and Dixie Kong instead go to his home island, Crocodile Isle, to rescue him. Donkey Kong Country 3: Dixie Kong's Double Trouble! has him assume the alias of mad scientist "Baron K. Roolenstein", as well as kidnap both Donkey and Diddy to power his robot KAOS, in a bid to control the Northern Kremisphere; Dixie and Kiddy stop these plans and free Donkey and Diddy. In Donkey Kong 64, he reappears in a new mechanical version of his old island, plotting to destroy DK Island with his Blast-O-Matic, but it gets damaged on arrival. He thus has Diddy, Lanky, Tiny, and Chunky captured, as well as Donkey and Diddy's banana hoard stolen again, to buy time to repair the weapon. Once the Kongs disable it, K. Rool flees, but crashes his airship on DK Island, where the final battle, an extended boxing match where he goes by "King Krusha K. Rool" (with a typical champion boxer getup), takes place. He also appears in the Donkey Kong Land series, in similar roles to their SNES counterparts, as well as DK: King of Swing and DK: Jungle Climber. However, he remains absent in either game of the revived Donkey Kong series (Donkey Kong Country Returns and Donkey Kong Country: Tropical Freeze), and neither do his Kremlings.
How to Unlock
Use King K. Rool's Super Smash Bros. amiibo or scan King K. Rool's AR Icon from the M.U.G.E.N Trilogy website.