Bowser

"SHOWTIME!"

- Bowser's catchphrase/battle cry

"GWAHAHA! Great dark hurricane! Seriously, perfect backdrop for an awesome final battle! You really sweat the details! Listen up! You're saying the kingdom will vanish? NOT TODAY! THIS KINGDOM IS ALL MINE! SO YOU VANISH!"

- Bowser to Dark Bowser

"I'm bad, and that's good. I'll never be good, and that's not bad. There's no one I'd rather be than me."

- Bowser in Wreck-It-Ralph

Bowser (sometimes known as King Koopa) is the King of the Koopas and the main antagonist of the Super Mario franchise. Even though he is the main antagonist in the Super Mario Bros. games, he has a more anti-heroic role in some Mario RPG's, and is also an ally in the Skylanders series. Bowser is a turtle-esque monster who can breathe fire out of his mouth. In the Mario RPG's, he aids Mario and Peach in rescuing Luigi from Dimentio who hypnotized him for evil purposes in Super Paper Mario. When he joins Mario and Peach in Super Mario RPG: Legend of the Seven Stars, he became an ally to Mario, Mallow, Peach and Geno to fight Smithy and his followers who are the main antagonists. His mortal enemy is Dark Star who was the main antagonist in Mario and Luigi: Bowser's Inside Story because Dark Star has bigger plans than him.

He also appears in Skylanders.

He is voiced by Kenny James as his normal self, while being voiced by Frank Welker as his gargantuan form, Giga Bowser, in the Super Smash Bros. series.

Bowser also appears in Wreck-It Ralph as one of the minor characters and a member of Bad-Anon.

Biography
Bowser is the king of the Koopas and believes himself to be the supreme, unquestioned ruler of a kingdom far from Skylands. A hot-tempered and spiky-shelled warrior, he was transported to Skylands by travelling through a rift that had been created by Kaos' terrible Sky-Eater. The Skylanders sent out a distress call across all the dimensions to call for reinforcements, and for reasons known only to himself, he has decided to join this epic battle against Kaos and the Darkness in his Clown Cruiser as the newest and most lethal of all the SuperChargers!

Super Smash Bros
Bowser appears in most of the smash bros games except the N64 game.

In Super Smash Bros. Ultimate Bowser was vaporized by Galeem and the only way to unlock bowser is to defeat Giga Bowser.

Power and Abilities

 * Fire Breathing: Bowser's most prominent and consistent ability, appearing in nearly all games he has been featured in. can breath continuous streams of fire, or shoot blasts or flurries of fireballs at his foes. In some games, like Super Mario World and New Super Mario Bros U, can make it "rain" fire blasts, and, in Super Mario 64 and New Super Mario Bros., can also shoot blue fire blasts that can home in on Mario. His fire breath is so hot that it is also just as effective underwater as it is on land.
 * Superhuman Qualities: Over the years, Bowser has displayed countless feats that put him far above the average person.
 * Superhuman Strength: Bowser's raw physical strength is frequently seen as one of his main powers. He can smash through boulders, lift immensely heavy objects with relative ease, and topple enemies numerous times his size. In many of the RPG and sports games, is typically among the strongest characters in the game, like in Super Paper Mario, where his attack stat is twice that of Mario, Luigi and Princess Peach's respectively. Much like with his fire breath, prides himself on his strength and frequently incorporates physical attacks into his fighting because of this.
 * Superhuman Durability: Bowser has proven time and time again that he is not taken down very easily by most foes. He can endure a seemingly endless amount of punishment, and somehow always returns from this in one way or another. He has been drenched in lava, electrocuted, blown up, crushed by objects as heavy as his castle numerous times, fallen hundreds of feet, and even squashed by a T-Rex in Mario's Time Machine, and has inevitably survived each fate. In Super Paper Mario, after he seemingly sacrifices himself by holding up the ceiling of Count Bleck's Castle with O'Chunks, Luigi encourages the Princess and his brother to not give up hope on him by saying "he's survived far worse".
 * Superhuman Speed and Agility: Although his speed is hardy consistent between games, in some of his appearances, Bowser is shown to be a capable runner and quite agile for his size. In Mario & Luigi: 's Inside Story, uses a treadmill placed by Fawful and Midbus to burn off thousands of calories gained by eating incredibly unhealthy food in only a few seconds.
 * Superhuman Stamina: Bowser's stamina is almost as limitless as his durability. He rarely ever shows signs of tiring, even when massively expending himself for hours on end. In battle, never slows down, keeping up with Mario and other enemies like his dark counterpart Dark Bowser blow for blow.
 * Dark Magic: While not as prolific in the use of it as Kamek, Bowser is well versed in using various forms of Dark Magic against his opponents. He knows spells that can transform people into inanimate objects, as explained in the manual of Super Mario Bros. and he has used different magical wands over the years for varying purposes (although this is more commonly seen in the cartoons and comics).
 * Size Manipulation: In numerous games, can transform himself into a giant size to battle his enemies. Most of the time is empowered by Kamek or somebody else, but, as seen in Bowser's Inside Story, it is supercharged with adrenaline, he can temporarily achieve his giant size naturally. In the Super Smash Bros. series, by breaking a Smash Ball, can become Giga Bowser, an alternate yet still effective version of his typical giant form. Regardless of how he gains it, Bowser's giant form massively increases his strength, durability, and other abilities, to the point where Mario and other characters cannot fight him directly and must find some other way to defeat him. In games such as Paper Mario and Super Mario Galaxy 2, Bowser can use the power of Stars to grow himself to immense size.
 * High Skill in Sports and Other Activities: Like almost all Mario characters, Bowser is an extremely qualified player in numerous sports and physical activities. While not being particularly talented in any activity, he has been shown as a skilled tennis, soccer, hockey and basketball player, golfer, go-kart racer, Olympic athlete, wrestler (given some of his moves in the Smash Brothers games), and even a professional dancer.

Trivia

 * He sometimes allied to Mario and his friends in some of the games to fight against greater threats.
 * However, in Skylanders Superchargers, he instead teams up with fellow Nintendo character Donkey Kong and the Skylanders and their allies to destroy the Sky Eater and to protect Skylands from Kaos.
 * He mostly kidnapping Princess Peach and get her to like him.
 * It has been noted by fans that whenever Bowser isn't kidnapping Peach he's surprisingly friendly towards Mario and co. Examples include RPGs where Bowser is forced to ally with Mario against a bigger threat and multiplayer based spinoffs such as Mario Kart.