Thousands of years in the past, the legendary Alpha Pokémon Arceus came to Earth to retrieve a "Jewel of Life" that it had loaned to a man named Damos. Damos however betrayed Arceus and attacked it with a large army of Pokémon. After presumably killing Damos in its counterattack, Arceus went to sleep, vowing to judge all humans when it next returns based on Damos's actions.