Disney Fanon Wiki
Leave my mama alone you bad man!
―Bowser Jr.[src]

Bowser Jr., known in Japan as Koopa Jr. (not to be confused with Koopa Kid), is the secondary antagonist of the Mario series, and the youngest child of Bowser and the apparent heir of the Dark Land. He is a 4 years old little koopa. He debuted in Super Mario Sunshine. He acts as the main antagonist of both Super Mario Sunshine, and New Super Mario Bros., with his father only playing a minor role in each. He is a playable character in various multiplayer Mario games. Since his debut, he has stolen the spotlight as the main villain from his father in a few Mario games.


Super Mario series[]

Super Mario Sunshine[]

Bowser Jr. debuted in Super Mario Sunshine. In it, Bowser Jr. uses a magic paintbrush, invented by Professor E. Gadd, and a special kerchief to transform into a translucent blue doppelgänger of Mario, Shadow Mario, who vandalizes Isle Delfino, tricking the native people into believing that Mario himself is to blame. He does this to Mario because Bowser tells him thatPrincess Peach is his mother, and that Mario has kidnapped her. Bowser Jr. kidnaps her himself, and is eventually defeated along with Bowser. He realized that Princess Peach isn't his mother before Bowser decided to tell him, but he still refers to Peach as "Mama" sometimes in later games, such as when he challenges Princess Peach to a game in Mario Superstar Baseball.Bowser Jr's real mom is unknown.

New Super Mario Bros.[]

He is once again the main antagonist and kidnaps Princess Peach. He drags Peach around through different worlds as Mario chases him. In this game, Bowser Jr. is the boss of every tower. 

His attack pattern depends on how he wears his bandanna. If it is hanging loose, Bowser Jr. will jump and charge at Mario and can be defeated by simple jump attacks. If he wears the bandana over his mouth, Bowser Jr. will  throw Koopa shells at Mario and duck into his shell whenever Mario comes near, preventing jump attacks from working. Bowser Jr. also helps his father during the final battle of the game. At the end of the game, Bowser Jr. can be seen dragging his father to his castle. Bowser Jr. looks at the player who is watching, gets angry and then helped back to his father. Bowser Jr. doing this breaks thefourth wall as he acknowledges the player's existence.

Super Mario Galaxy[]

Bowser Jr. is a boss and also appears in the last level of three domes in Super Mario Galaxy. He arrives in a tiny ship at the end of his airship and fires cannonballs while the player fights Koopa Troopas. If a Koopa's shell is thrown at his ship, he will start firing homing-Bullet Bills. Hit it again and a Magikoopa will appear. Hit it one more time and fireballs will start flying out from it. Three more hits and it explodes and Bowser Jr. gets away. Bowser Jr. is fought for a second time in his small personal airship. In his third encounter, he summons a black King Kaliente to attack. He will first spit out three fireballs, followed by a coconut. The player must perform a spinning attack to whack it back at him, then the king will throw it back at Mario. If Mario whacks it at him three times with the coconut fly past him, he will knock the king's crown off. If it is missed, the attack pattern will repeat until Mario is successful.

Bowser Jr. was not seen again until Mario reaches Bowser's Galaxy Reactor, where he is shown keeping Peach on his airship. While Mario marches up the steps to confront Bowser Jr., he fires cannonballs that collapse the steps. He then watches the final battle while keeping Peach. After Bowser is defeated, the Galaxy starts going haywire. Jr. falls out of his airship and falls into his father's sun. Later, however, he is shown alive and jumping in the Mushroom Kingdom.

New Super Mario Bros. Wii[]

Bowser Jr. and the Koopalings hid in a cake during Princess Peach's birthday, and showed up by surprise and kidnapped the princess. He battles Mario on an airship in Worlds 4, 6, and 8. In his first battle, he uses his new mini Koopa Clown Car and spits fireballs for the first time. When his fire hits the ground, it creates a large blaze there, the player must be careful not to land on these. The only possible way to attack him is to use the Propeller Block in order to spin up to his height and jump on him. He must be hit three times to be defeated. In the second battle, he uses his damaged Clown Car. Luckily, Mario finds a similar Car to use in combat. Mario's Car must be flown up by the player and used to knock Jr. into the electrical fence on the walls of the room. He must be hit three times either by the electric fence or on the head (or a combination) to be defeated.

In the third battle, Bowser Jr. uses his father's Clown Car since the one he had previously was broken. In battle, Jr. drops large mines on the field. A ground pound must be used on the wavy floor to lob the mine back up and damage the Clown Car. Bowser Jr. can now fire more than one fireball in a row, and they create blazing obstacles on the floor. In addition, these fireballs can home in on Mario. He must to be transferred into a state of defeat.

In the final scene of Peach, Mario, Luigi and Toads, a new scene opens with Larry down, tired. Then, Jr. appears and draws the attention of his brother, and points to Bowser overturned and the Koopalings helping him. Then Bowser gets back to normal, bringing joy to their children, but falls on his castle of all.

Super Mario Galaxy 2[]

Bowser Jr. reprises his role as the secondary antagonist. Like the previous game, Bowser Jr. will prevent Mario from reaching and fighting Bowser, via summoning monsters and controlling machines. During his first encounter, Bowser Jr. summons a gargantuan dragon Gobblegut in order to fight Mario, but is easily defeated by the Italian plumber. Later, Bowser Jr. attacks Mario with a giant robot (Megahammer) and is easily defeated yet again. Finally, in a last attempt to extinguish Mario, Bowser Jr. uses a large battle tank. After the third and final battle, Bowser Jr. is defeated for good and is not seen to the end of the game.


Disney Fanon Wiki has a collection of images and media related to Bowser Jr..


The Disney Wiki has an article focusing on the relationships of Bowser Jr..



v - e - d
Super Mario logo
Super Mario Bros.
Main: Super Mario Bros.Super Mario 64Paper MarioMario Kart WiiMario Kart 8Mario PartyMario Party SuperstarsSuper Mario 3D WorldSuper Mario OdysseyMario Golf: Super RushSuper Mario SunshineMario Kart 64Super Mario PartyMario Kart TourSuper Mario Run
Main: MarioLuigiPrincess PeachPrincess DaisyRosalinaToadPaulineKoopalingsVivianRabbid Peach
Other: Donkey KongDiddy KongKing K. RoolYoshiBirdo
Villians: BowserBowser Jr.WarioWaluigiFawful
Disney Parks
Mushroom KingdomWorld 1-1Minus World
See also
NintendoSuper Smash Bros.