Quoted By:
>Articuno, Zapdos, and Moltres: The enhanced forms of common bird Pokémon.
>Mewtwo: A Mew that has been genetically modified.
>Mew: The progenitor species of Pokémon that was sent into all RKS-made worlds by the original human race.
>Raikou, Entei, and Suicune: The revived and enhanced forms of a rare species of Pokémon.
>Ho-oh: A factory of ancient medical nanomachines that has taken its current form after evolving for millions of years.
You people do the rest.