Primal Pokémon is the first devolution of the Pokémon series. It is similar to Mega Pokemon, except the Pokémon changes into its ancient form. It was first revealed at the boxarts of Pokémon Omega Ruby & Alpha Sapphire. More info was given in June Corocoro leaks.
Its method of devolution is called Ancient Devolution
It is a possible new game mechanic introduced in Pokémon Omega Ruby & Alpha Sapphire.
Known Ancient Devolutions
| Pokémon | Ancient Devolution | Characteristics that change when Ancient Devolving | |
|---|---|---|---|
 Kyogre Water |
 Primal Kyogre Water |
Ability: ??? | |
| PS: ??? | Speed: ??? | ||
| Attack: ??? | Defense: ??? | ||
| Sp. Attack: ??? | Sp. Defense: ??? | ||
 Groudon Ground |
 Primal Groudon Ground |
Ability: ??? | |
| PS: ??? | Speed: ??? | ||
| Attack: ??? | Defense: ??? | ||
| Sp. Attack: ??? | Sp. Defense: ??? | ||