Haru-ōji

The Prince Haru is the prince of the Mushroom Kingdom. He appears in the anime movie The Great Mission to Save Princess Peach.

He first appears in the beginning of the movie as a blue dog named Kibidango who has been turned into a dog by King Bowser. At the end, thanks to Mario and Luigi, the prince is turned back into a human.

The prince is most likely Princess Peach's brother.