Primal Reversion (ゲンシカイキ Primal Reversion) is a concept introduced in Pokémon Omega Ruby and Alpha Sapphire. It is similar to Mega Evolution, except that the Pokémon goes back into its ancient, original form, where it regains the true, ultimate power it formerly had. The only known Pokémon that are able to do this are Groudon and Kyogre. Primal Reversion is represented with the symbol Ω (Omega) for Groudon () and the symbol α (Alpha) for Kyogre (). The keys to Primal Reversion are the Red and Blue Orbs, both used by their respective counterparts.
In the Hoenn region, it is believed that two extremely powerful Pokémon existed: Groudon, who formed the land, and Kyogre, who formed the seas. They are talked about in a legend:
|“|| Long, long ago, there appeared in Hoenn two Pokémon of fearsome power. These two became known, in later times, as Groudon and Kyogre. When Groudon howled, the earth swelled and the land grew wide. The sun blazed overhead, and all the world around the creature was enveloped in incandescent heat. When Kyogre roared, water poured forth and the seas spread outward. Dark clouds enshrouded the world, and the deluge fell upon all...
It was a primal age, early in the world’s history. The natural world was overflowing with energy. That energy granted Groudon and Kyogre an overwhelming power. Seeking ever more of that energy for themselves, the two clashed again and again, and their battles cast the people and Pokémon of Hoenn into great danger. Brimming with the overwhelming power granted to them by nature’s energy, their transformation was named "Primal Reversion" by later people. And the people called their tormentors Primal Groudon and Primal Kyogre...
In some places, cave paintings depicting the legends and the two Pokémon can be found.
There are also legends about Mega Rayquaza, who has some kind of relation with Primal Reversion:
|“||One Pokémon looked down upon this battle from the sky above. The Pokémon that dances in the heavens: Rayquaza. Rayquaza is venerated by the people of Hoenn as their protector and savior. When Primal Groudon and Primal Kyogre had battled for 20 dawns and 20 nights, the world began to lose its natural balance and tilt toward destruction. The people, unable to endure any more, cried out to their mighty savior Rayquaza before a great stone that shone with rainbow brilliance. And a change came upon Rayquaza, weaving in the sky above Primal Groudon and Primal Kyogre. Suffused in brilliant light, its body began to transform visibly. And then...||”|
Pokémon Capable of Primal Reversion
|Pokémon||Primal Reversion||Characteristics that change after Primal Reversion|
|Ability: Primordial Sea|
|PS: +0||Speed: +0|
|Attack: +50||Defense: +0|
|Sp. Attack: +30||Sp. Defense: +20|
|Ability: Desolate Land|
|PS: +0||Speed: +0|
|Attack: +30||Defense: +20|
|Sp. Attack: +50||Sp. Defense: +0|
- Unlike Mega Evolution, Pokémon automatically revert into their Primal form when starting battle. Primal Reversion is also unlimited in terms of how many times it can be activated.
- Pokémon Mystery Dungeon: Explorers of Time & Explorers of Darkness featured Primal Dialga as a final boss. However, Primal Dialga is just Dialga after losing control of its powers and going berserk because of Temporal Tower's destruction. "Primal" in this case refers to the Pokémon being evil or corrupted rather than returning to its original form.
- Primal Kyogre and Primal Groudon's abilities, Primordial Sea and Desolate Land, are both a reference to life on Earth. Primordial Sea refers to the primordial soup that first brought about life, while Desolate Land refers to the eventual end of the world. They also reference Alpha and Omega's statuses as the first and last letters of the Greek alphabet.
|Pokémon Transformations and forms|