Einra, like most adventurers, roamed the lands and seas with a singular focus of becoming the very best. Faithful Gym Leaders, Elite four, Champion, Team Generic Evil, all presented values and ambitions, but none presented a challenge. Uninterested in any further adventures, Einra one day found an abandoned amusement park, and with the help of his longtime friends, restored it to what is now a well-known Castle of Challenges. Parkgoers come for the thrill of building a team of Pokémons from roster and challenging one another.