Bowser Jr.

Bowser Jr. is the secondary antagonist of both Super Mario Galaxy and Super Mario Galaxy 2. He is the son of Bowser and Prince of Koopas, who help his father to conquering universe and destroy Mario.

Super Mario Galaxy
Appearing as the secondary antagonist, Bowser Jr. guards three of the Grand Stars in Super Mario Galaxy. He appears first in Bowser Jr.'s Robot Reactor, where he summons Megaleg to attack Mario. He later appears in Bowser Jr.'s Airship Armada in his small personal airship to fight Mario. Even later, he is seen in Bowser Jr.'s Lava Reactor, where he summons a more powerful King Kaliente to attack Mario. In all of these fights, he or his minion is beaten.

Bowser Jr. is 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, Bowser Jr. fires cannonballs that destroy the steps. He then watches the final battle while keeping Peach. After Bowser is defeated, the galaxy starts to go haywire. Bowser Jr. falls out of his airship and into his father's sun. Later, however, he is shown alive and dancing back in the Mushroom Kingdom on an airship in the water with an Octoomba.

Super Mario Galaxy 2
Bowser Jr. makes an appearance as the secondary antagonist again in Super Mario Galaxy 2, aiding his father, who he is not seen with at all, once again, as in the first game.

His first appearance in Bowser Jr.'s Fiery Flotilla is a brief one, where he appears in his robot cockpit and summons Gobblegut to the battlefield to fight Mario for the first Grand Star. He later battles Mario and Yoshi himself in Bowser Jr.'s Fearsome Fleet by piloting the giant Megahammer robot to impede Mario's retrieving the third Grand Star. Later, in Bowser Jr.'s Boom Bunker, the Boomsday Machine is Bowser Jr.'s vehicle of choice. The machine attacks with spinning Firebars and by launching balls of electricity as Bowser Jr. guards the fifth Grand Star. Once Mario defeats Bowser Jr.'s Boomsday Machine, it explodes and sends Bowser Jr. flying off into space. He is not seen again for the remainder of the game, and it is unknown exactly what happens to him.

Mario actually fights Bowser Jr. up to four times in this game, as two of the battles are under Daredevil Comet conditions.

Powers and abilities

 * Piloting: Bowser Jr. is able to piloting many machines like flying engin, a Hammer Robot and even a tank.
 * Control over many monsters: Bowser Jr. has control over many monster, and uses they for attack Mario.