Prince Peasley is a character from Mario & Luigi: Superstar Saga for the Game Boy Advance.
Prince Peasley is the prince of the Beanbean Kingdom, and the son of Queen Bean, who is the queen of the aforementioned kingdom. During the game, he helps Mario and Luigi on their quest to stop Cackletta.
A poster of Prince Peasley could be seen in the background of the Toad Town shop in Mario and Luigi: Partners in Time for the Nintendo DS.
When Prince Peasley shows off his blond hair, it literally lights up the entire screen.