King Koopa

He is the tyrannical ruler of Dark Land, leader of the Koopa Pack, father of the Koopa Kids and arch-nemesis of Mario, Luigi, Princess Toadstool, Toad and Yoshi. King Koopa is a huge green reptile with a crown, yellow sclera and black eyes, huge sharp teeth, and a huge green shell with white spikes, horns and wears two spiked armbands. He hates plumbers (Specifically Mario and Luigi) King Koopa's full name is Bowser Koopa or King Bowser Koopa. Koopa is often dishonest and treacherous, as well as sadistically enjoying doing really horrid things, including trying to ruin Christmas for everyone, as he saw it as a "Bah Humkoop". While Koopa is not beyond keeping his word, he frequently does break it. Koopa will not hesitate to dispose of those who have outlived their usefulness to him. As seen in the episode Crimes R Us, Koopa's justification for turning on Clyde is that he, had his fingers crossed when he agreed to split everything stolen equally, thus allowing Koopa to cut Clyde out of the deal later on; These sort of justifications are commonly employed logic for Koopa to get-away with nearly anything as far as he is concerned. His exact traits shift wildly though from episode to episode. He even takes on other villains and becoming an even bigger threat to the land they were targeting.

As stated by Herlock Solmes in The Adventures of Sherlock Mario, when Bowser Koopa was young, he was cowardly bully who the other koopas never let play with them and gave the nick-name, "lizard-lips". He also had urinary incontinence until he was twelve and flunked kindergarten so many times that he established a world record for it. In adult years, Bowser somehow established himself as the tyrannical king of the entire Koopa race and other species, such as the Goombas, Piranha Plants, Shy Guys, etc. He also apparently sired seven children, which included the brutish Bully Koopa, the talkative Big Mouth Koopa, the devious Cheatsy Koopa, the inventive Kooky Von Koopa, the vain Kootie Pie Koopa (his only daughter), and the twins, Hip and Hop Koopa. Since then, King Koopa has constantly attempted to kidnap the princess again and again, often with the help of his assistant, Mouser and his other liutenants, Tryclyde, Clawgrip and Fry Guy, but was always thwarted by the Mario Bros, who act as her bodyguards as they traversed the country, liberating the various territories of the Mushroom Kingdom from Koopa's control while also searching for a way to drive the evil monarch out of the kingdom for good. Sometimes, the threat King Koopa posed often shifted, as, in some instances, he would only appear as a minor annoyance while in others he would conquer or come close to destroying cities, towns, or even planets. King Koopa's design is based heavily on Bowser's sprite in the original game and consists largely of the color green, although Bowser looks nothing like this in the manual or following games. He also lacks hair and wears a golden crown and only wears two spiked armbands instead of four and no spiked collar around his neck. King Koopa does not possess the ability to breathe or shoot fire, one of Bowser's most notable traits, and instead uses his various magic wands or minions for long ranged attacks. In the intro to Super Mario World, he notably throws a fireball at the Brothers while escaping.

One of his quotes from his grandfather, "Like my grandfather Poopa La Koopa always said: "Cheat, beat, and be merry!" Besides his grandfather Poopa La Koopa, he has his mother, her name is Sherald Koopa.

He tries to kidnap Princess Toadstool so he can rule the Mushroom Kingdom and enslave the Mushroom people. King Koopa himself rules Darklands.

King Koopa likes his feet lick (Gross), smoking cigars and drinking.