Bowser Jr. is the son of Bowser, the main antagonist of the Super Mario series. He is known for his mischievous and energetic personality, often serving as a secondary antagonist and causing trouble for Mario and his friends. Bowser Jr. is highly devoted to his father, frequently assisting him in his schemes to kidnap Princess Peach and defeat Mario. Despite his villainous actions, Bowser Jr. is portrayed with a playful side and occasionally teams up with the heroes in certain games.