bowser_jr.
The Prince of the Koopas. Bowser Jr. (sometimes written as Bowser Junior) is Bowser's child–and the only one since Shigeru Miyamoto gave official notice of Bowser's paternity of the Koopalings having been retconned in a 2012 interview.
He is often seen riding on his own personal flying vehicle, the Junior Clown Car.
Not to be confused with Baby Bowser.