Primal Reversion

Prehistoric Pokémon is the first devolution of the Pokémon series. It is similar to Mega Pokémon, except the Pokémon changes into it's ancient form. It was first revealed at the boxarts of Pokémon Omega Ruby & Alpha Sapphire. More info was given in June Corocoro leaks.

Currently only two Pokémon have this ability to devolve.

Current Roster

 * Prehistoric Groudon
 * Prehistoric Kyogre