King K. Rool
King K. Rool (キングクルール, King K. Rool) is the main antagonist of the original Donkey Kong Country series and several Donkey Kong spin-off titles and the archenemy of Donkey Kong and Diddy Kong. Unlike most Nintendo-owned antagonists, he was created by the UK-based developer Rare.
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, burly reptile who antagonizes Donkey Kong, much like how Bowser antagonizes Mario. However, while Bowser has frequently wavered between friend and foe for the Mario Bros. and is respectful towards his minions, K. Rool 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 stole 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 her younger cousin 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 takes place: an extended boxing match where he goes by "King Krusha K. Rool" (with a typical champion boxer getup). He also appears in the Donkey Kong Land series, in similar roles to their SNES counterparts; he also appeared in DK: King of Swing and DK: Jungle Climber, as well as the spin-off racing game Donkey Kong Barrel Blast, which were developed by Paon. In the latter games his design is noticeably altered, as he no longer wears a piece of golden armor, leaving his tan belly completely exposed, and no longer has a tail; he also sports more realistic proportions, especially in regard to his facial features, and a brighter color palette. He did not appear in either game of the revived Donkey Kong series, developed by Retro Studios (Donkey Kong Country Returns and Donkey Kong Country: Tropical Freeze), and neither do his Kremlings, being replaced by the Tiki Tak Tribe and the Snowmads, respectively.
King K. Rool appears as a trophy.
King K. Rool appears as both a trophy and a sticker.
The King K. Rool trophy is unlocked by clearing Target Smash level 4 with all characters.
As a costume
The King K. Rool trophy appears in both versions of the game.
Whereas Mario often squares off against Bowser, Donkey Kong must fight against King K. Rool. He's a big croc with a big attitude...and a tiny crown. He probably could have been Donkey Kong's most trustworthy animal friend. Think he'll ever have a change of heart? Not likely.
As a playable character
Main article: King K. Rool (SSBU)
King K. Rool was announced as a playable fighter for the first time in an Ultimate-centric Nintendo Direct on August 8, 2018. King K. Rool is the first character in Link's Classic Mode character unlock sequence, and as such can potentially be the first character to be unlocked. His design is based on Paon's post-Donkey Kong 64 redesign of the character, with embellishments taken from the original Donkey Kong Country, such as his gold-plated belly and waist-long cape. His more pronounced scales are original to the Smash Bros. series.
During certain attacks, he dons outfits as references to several games, such as his "Kaptain K. Rool" pirate hat from Donkey Kong Country 2: Diddy's Kong Quest during Blunderbuss, and "Baron K. Roolenstein"'s Propellerpack from Donkey Kong Country 3: Dixie Kong's Double Trouble!.
King K. Rool's inclusion was largely facilitated by popular demand within and outside of the Super Smash Bros. Fighter Ballot. In an interview following the August 2018 Smash Direct, Masahiro Sakurai revealed that the development team used the survey as reference for choosing newcomers and that King K. Rool was a massively popular choice in the poll. He said that it would be better if he left the moveset to the player's imagination at the time of his reveal, but specified that to maintain his likeness that he would be standing upright, even if he will appear smaller than usual.
As a costume
King K. Rool's costume for the Mii Brawler from the previous game returns, now being an unlockable costume. In contrast to K. Rool as a playable character, the costume retains its more old-school proportions and design quirks, although its textures were also updated to match the ones of K. Rool himself.