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Baby Bowser
Baby Bowser - Koopa Kart Wii.png
Baby Bowser
Kamek (guardian)
CLASS Prince of the Koopas
SERIES Yoshi series
Caety Sagoian

This article refers to Bowser in his infant form. For similar characters, see Bowser Jr. and Koopa Kid.

Baby Bowser (Japanese: ベビィクッパ Baby Koopa), also sometimes referred to as Bowsie, is the infant form of Bowser, who primarily appears as the main antagonist in the Yoshi titles. While it is unknown whether Baby Bowser has any parents, he is often shown to be in the care of Kamek, who appears to act as a surrogate parent in their absence; despite the Magikoopa taking care of the young Koopa, Baby Bowser often bullies him whenever his plans go awry.

Baby Bowser's appearance is near-identical to that of his future son, Bowser Jr. Though extremely similar however, the two do have slight differences that can be used to tell them apart: the most notable of which is that Baby Bowser often does not wear a bandana around his neck, and on the rare occasions that he does, his does not have a mouth printed on it like Bowser Jr.'s does. Additionally, in some of Baby Bowser's earlier appearances, he lacked any horns and had darker scales covering his body.

In the Koopa series, he is given drastic changes to make it easier to tell him apart from Bowser Jr; he wears a black bandana, has two long teeth as opposed to one short tooth, has red eyes, is given a pair of horns, and wears wristbands with four large spikes on each.

Game Appearances

Super Mario Bros: Diaper Duty

Baby Bowser appears as a playable character in the Wii platformer Super Mario Bros: Diaper Duty. He is only usable in one battle against his dad King Koopa where he can spit fireballs and claw. He is show repeatedly through the game being yelled at by his dad.

Mario Rugby League

Baby Bowser is a player on the Baby Brigade team on the multiplayer Wii sports game Mario Rugby League. He is a strong character with average skill but poor speed. His special skill is to shoot fireballs from his mouth which serves as an extended tackle.

Bowser's Castle Racing

Baby Bowser appears as unlockable playable character in the racing game Bowser's Castle Racing.


  • Weight: 17%
  • Driving Skill: 50%
  • Item Power: 30%
  • Speed: 65%

Yoshi's Island: From the Beginning

Baby Bowser appears in Yoshi's Island: From the Beginning as a secondary antagonist, and serves as the game's penultimate boss. During the events of the game, he primarily assists his father in his battle against the Yoshis.

Baby Bowser first appears to capture Usura Yoshi after the latter defeats several of his minions. He took the dark Yoshi to a prison beneath his castle, where he interrogates him about why the Yoshis hate the Koopas. Usura gave him a blunt answer: the Koopas are tyrants and the ones responsible for the chaos inflicting Yoshi's Island.

When fought in the Koopa Castle, he attacks Yoshi by throwing bombs and various other items at him. After Yoshi defeats him, he flees to the roof and summons a giant Koopa Troopa to his side: Hookbill Koopa.

During the game's climax, Baby Bowser stands before the room of his father and hears him calling the Yoshis weaklings, and fought Yoshi after his father's speech. After being defeated once more by Yoshi, his father denotes him a weakling, and fights a weakened Yoshi and Usura Yoshi in a powered up state, throwing his son aside. While two Yoshis defeat Baby Bowser's father, he flees the castle. In the epilogue, after the castle is destroyed in their fight, Baby Bowser is shown to be the one responsible for rebuilding it.

Super Toad Bros.

Baby Bowser is the boss of World 2 in Super Toad Bros. He charges at the player and breathes small fireballs.

Koopa Baseball series

Baby Bowser is a character in Koopa Superstar Baseball, where he excels in running speed and fielding abilities, but lacks in batting power. His pitching is average.

In Koopa Super Sluggers, he has good batting and fielding capabilities, but his speed is only average, and his pitching is weak.


Navigation Templates
Baby Mario | Baby Luigi | Baby Peach | Baby Daisy | Baby Wario | Baby Waluigi | Baby Donkey Kong | Baby Bowser | Baby Rosalina | Baby Yoshi | Baby Funky | Baby Dry Bowser | Baby Birdo | Baby Kamek | Baby Diddy Kong | Baby Dixie Kong | Baby Petey Piranha | Baby Geno | Baby Toad | Baby Toadette | Baby Tiny Kong | Baby Blooper | Baby Maria | Baby Luise | Baby Waria | Baby Walice | Baby Metal Mario | Baby Bowser Jr. | Baby Tanooki Mario


Super Mario Bros: Diaper Duty
Playable Characters
Baby Mario | Baby Luigi | Baby Wario | Baby Donkey Kong | Baby Yoshi | Baby Bowser | Toadsworth
King Koopa | Prince K. Rool | Kamek | Tatanga
Baby Funky | Baby Waluigi | Baby Peach | Baby Daisy | Cranky Kong
Big City | Donkey Kong Island | Yoshi Island | Sarasaland | Mushroom Kingdom
Bowser Jr MRU.png
Mario Rugby Union Logo.png
Mario MRU.png
Default Unlockable Downloadable
Player Mario | Luigi | Birdo | Toadsworth | Bowser Jr. Monty Mole | Noki | Bandit | Professor E. Gadd | Mona Lanky Kong | Larry Koopa | Goomba | Whittle
Catcher Peach | Baby Peach | Shy Guy | Waluigi Hammer Bro. | Penguin | Spike | Baby Daisy | Tiny Kong | Baby Yoshi Kass | Wendy O. Koopa | Zip Toad | Gearmo
Scrum-Halfy Donkey Kong | Bowser | Boom Boom King Bob-omb | Broozer | Petey Piranha | Funky Kong | King K. Rool | Kamella | 18-Volt | Coach Sumo Kong | Morton Koopa Jr. | Goombario | Dino Piranha
Speedster Yoshi | Toad | Baby Mario | Baby Luigi | Dixie Kong | Koopa Troopa | Luma Spooky Speedster | 9-Volt | Il Piantissimo Kip | Iggy Koopa | Baby Toad | Bob-omb Buddy
Goalie Diddy Kong Wiggler | Kritter | Paratroopa | Lakitu | Candy Kong | Star Bunny | Kamek | Ashley | Whomp Wrinkly Kong | Lemmy Koopa | Paragoomba | The Chimp
Trickster Daisy | Toadette | Boo | Dry Bones | Rosalina Young Cricket | Orbulon | Shroob | Fly Guy | Baby DK Kopter | Ludwig von Koopa | Toadbert | Bee
Tackler Wario Pom Pom | Pianta | Lubba | Jimmy T. | King Boo | Dry Bowser | Baby Bowser | Baby Wario Kludge | Roy Koopa | Goombella | Hungry Luma