Bowser

Mario and Luigi's archest enemy of them all. Repeatedly tries to kidnap Princess Peach and take over the Mushroom Kingdom.

Bowser first appeared in Super Mario Bros. for the NES. He kidnapped Princess Toadstool and took her to the eighth castle. The other seventh castles contained Mushroom Retainers.

Bowser did not appear in Super Mario Bros. 2 - however, he returned for Super Mario Bros. 3. This game introduced Bowser's seven children, the Koopalings - Ludwig von Koopa, Lemmy Koopa, Roy Koopa, Iggy Koopa, Wendy O. Koopa, Morton Koopa Jr. and Larry Koopa. Each Koopaling conquered one of the kingdoms of the Mushroom World by transforming the king of each kingdom into an animal, and Mario had to defeat each one to obtain the Magic Scepter to return the Mushroom Kings back to normal. Bowser kidnapped the princess in this game as well, and of course, Mario rescued her.

Bowser and the Koopalings reappeared in Super Mario World. Not only did Bowser kidnap Princess Toadstool, but he also kidnapped the Yoshies, who Mario, Luigi and a few Yoshied, freed by the brothers, had to free by defeating each Koopaling. At the end of the game, the Yoshi Eggs the baby Yoshies were trapped in hatched.

Bowser appeared as a baby in Super Mario World 2: Yoshi's Island. For more information, see Baby Bowser.

Bowser actually joined Mario's team in Super Mario RPG. Since Smithy had stolen his castle, there was no reason not to help Mario defeat Smithy and his weapons. He used Chain Chomps and his claws as weapons, and his special moves often involved summoning his minions to attack.

Bowser kidnaps the princess once again in Super Mario 64, and as usual, Mario stopped him. He did the same thing in the second Mario RPG, Paper Mario (Nintendo 64).

Bowser didn't appear in Luigi's Mansion for the Nintendo GameCube - instead, King Boo used a Bowser suit to fight Luigi. After a spiked ball was thrown at the head, King Boo was exposed and Luigi could suck him up with his Poltergust 3000.

Bowser and his son Bowser Jr. appeared in Super Mario Sunshine. Bowser Jr. was at first disguised as Shadow Mario, but he is later revealed to be Bowser Jr, Bowser's 8th son. Note that Bowser Jr. is not Baby Bowser or Koopa Kid (see Bowser Jr for more information).

Bowser helped Mario again in the third Mario RPG, Mario & Luigi: Superstar Saga - but not for long. Bowser takes thr brothers on the Koopa Cruiser to BeanBean Kingdom, but the Koopa Cruiser is brought down by Fawful and Bowser is shot out of a cannon by a Toad. The next time the Mario Bros. see him, he has amnesia and is working for Popple, the Shadow Thief, by the name of Rookie. Mario and Luigi fight Rookie and Popple twice in the game before he regains his memory just in time for Cackletta to posess his body and become Bowletta. Bowletta kidnaps Peach, which leaves Mario and Luigi with the task of rescuing her by defeating Bowletta, who has teamed up with the Koopalings. After defeating Bowletta, tje bros. are taken into her stomach to fight Cackletta's spirit for the final battle. With her destruction, Bowser returns to normal.

Bowser also appeared as a sort-of-villain in Paper Mario: The Thousand-Year Door. He tried to collect the Crystal Stars before Mario, but he didn't collect any of them. Players controlled Bowser for short periods of time at the end of each chapter (excluding the final one).

Quotes
''I am Bowser, buisnessman of legend! Fear my accounting!'' - Paper Mario: The Thousand-Year Door

Like the moon over The day, my genius and brawn Are lost on these fools. - Super Mario RPG: Legend of the Seven Stars

''Great, just great. Now I look like the King of GUYS WHO TALK TO POSTERS!'' - Paper Mario: The Thousand-Year Door

Paper Mario Stats
Max HP:
 * Round 1: 50
 * Rounds 2 and 3: 99

Attacks: -Ring Attack: Uses the star rod to create a ring to attack Mario and his partner. Does 3 damage to Mario's partner and does 4 damage to Mario. -Claw Attack: Swipes his claw at Mario, which might poison him in the process. Does 6 damage. -Fire Breath: Breathes fire at Mario. Does 8 damage. -Ring Attack: Uses the star rod to create a ring to attack Mario and his partner. Does 3 damage to Mario's partner and does 6 damage to Mario. -Claw Attack: Swipes his claw at Mario, which might poison him in the process. Does 8 damage. -Jump Attack: Jumps on Mario, causing him to lose one of his commands. Does 8 damage. -Fire Breath: Breathes fire at Mario. Does 10 damage. -Lightning Slam: Causes lightning to strike Mario. Does 10 damage.
 * Round 1:
 * Rounds 2 and 3:

Defense:
 * Round 1: 1
 * Rounds 2 and 3: 2

Tattle:
 * Round 1: It's the Evil King Bowser! Finally, after all this time! He has a huge arsenal of attacks, from blowing clouds of fire to jumping on us. Fire Attack: 8, Stamp Attack/Nail Attack: 6 I'm sure he has other attacks that I don't know. Boy, does he look nasty! He's strong enough as it is, but I'm sure he can use that Star Rod to increase his power until he's nearly invincible. Princess Peach needs us! Let's take him, Mario!
 * Round 2: It's the Evil King Bowser! Uh... I think he got bigger. That's not a good sign... He has a huge arsenal of attacks, from blowing clouds of fire to jumping on us. Fire Attack: 10, Stamp Attack/Nail Attack: 8 I'm sure he has other attacks that I don't know. Kammy Koopa's mysterious device has somehow beefed up his power even more. That's hardly fair! You should use that Star Beam whenever he uses the Star Rod to increase his power. Oh, you already knew that?
 * Round 3: It's the Evil King Bowser! No more messing around! He has a huge arsenal of attacks, from blowing clouds of fire to jumping on us. Fire Attack: 10, Stamp Attack/Nail Attack: 8 I'm sure he has other attacks that I don't know. When he increases his power with the Star Rod, our attacks will be totally useless. When that happens, you must use our ultimate weapon, the Peach Beam!  It has the power of everyone's wishes! This is our time, Mario!  Let's take this chump!  We're coming, Princess!

Paper Mario 2 Stats
Glitz Pit Battle

HP: 30, Attack: 3, Defense: 1

Tattle: That's Bowser! But what's he doing here?!? My mind just blew a fuse! Max HP is 30, Attack is 3, and Defense is 1. He's uglier than I expected. He's got a poisonous bite, so watch out! It'll make your HP decrease gradually. Also, if he ground-pounds you, you won't be able to use one of your commands! Just focus your attention on beating him down, Mario!

Palace of Shadow Battle

HP: 70, Attack: 7, Defense: 2

Tattle: That's Bowser, genius. You've only fought this guy like, a bazillion times. He'll keep kidnapping Peach, and you'll keep fighting him, until the end of time, I think. Max HP is 70, Attack is 7, and Defense is 2. In addition to his fire breath, he jumps on you and bites. If you get jumped on, you'll be unable to use a command for a little while. Oh, and his bite sometimes poisons you as well. I don't know what Bowser's doing here, but we gotta defeat him quick!