Bowser Jr., the son of Bowser and second heir of the Koopa throne, has been introduced in the fourth upcoming Super Smash Bros. installment for the Nintendo 3DS and the Wii U! Bowser Jr. will ride his own Koopa Clown Car from New Super Mario Bros. Wii. He can shoot cannonballs, spread one Mecha-Koopa at a time, turn his Clown Car into a Koopa Kart. His Final Smash is his alternative form, Shadow Mario. He uses his Paintbrush and make an "X" graffiti on the screen. Anyone who makes contact with the orange "X" will get hurt.
His palletes consists of the Koopalings, Bowser Jr.'s other seven "siblings". It was said that the Koopalings are not considered to be Bowser's children in the current story of Mario. They have the same identical moves as Bowser Jr., yet they have different voices and current designs first seen in New Super Mario Bros. Wii. Their Final Smash, which is the same as the younger Koopaling, suggests that they are also able to transform into Shadow Mario as well.