RecentPokémonleaks reveal lore regarding one Legendary Pokémon’s Mega Evolution, hinting at the possible return for the upcomingPokémon Legends: Z-Agame. Mega Rayquaza, which is seen in the lore ofOmega Ruby and Alpha Sapphire, now has deeper origins according to these leaks that imply a lot about the history of the Hoenn region. With the possible return of Mega Rayquaza, new lore could tie Kalos and Hoenn further together and even add more depth to this latestLegendsinstallment.
With the return to the Kalos region, Mega Evolutions are sure to return as a gameplay mechanic and should introduce brand-new battle evolutions for Pokémon. Existing Mega Evolutions may return as well, so it would be unsurprising if Mega Rayquaza is seen once again. The leaks regarding Mega Rayquaza acknowledge how a different direction was almost approached during its creation, and how the Pokémon and its history could have been slightly different. Despite this, if everything regarding the leak ties intoLegends: Z-A, there could be more to this iconic Legendary and its Mega form.

Mega Rayquaza Was Almost A Delta Evolution
If True, Mega Rayquaza Leaks Would Suggest More To Gen 3’s Lore
According toCentro LEAKSon X (formerly Twitter),Mega Rayquaza was originally planned to be a Delta EvolutionforOmega Ruby and Alpha Sapphire. As the post mentions, Delta and Mega are separate types of evolution and occur slightly differently. The leaks also mention how Delta Evolution was the basis for Mega Evolution, being recorded in old legends. This lore could easily be transferred intoLegends: Z-A, as Mega Evolution is bound to be in the game, and there is a chance Mega Rayquaza could be seen in the highly anticipated nextLegendsinstallment.
Delta Evolution being part of ancient history in the Hoenn region would thus also be considered important lore information about the Gen 3 games. The name “Delta” is also anunused title for anEmeraldremake known asPokémon Delta Emerald, which was trademarked by Nintendo but never made. The lore from these leaks could have been tied to the unmade game, where an Emerald remake was possibly planned to reveal more about the story behind Mega Rayquaza.

How Delta Evolution Is Different From Mega Evolution
Although Similar, Mega And Delta Evolutions Have Some Variations
The basics for Delta Evolution are similar to the way Mega Evolution works. What is needed is a Pokémon, a human, and a Keystone. The leaks reveal how Rayquaza does not need a Mega Stone for its evolution, as it is in the possession of the Mikado organ, containing the same power. The Keystone needed for the evolution must possess enough power to react to the Pokémon’s abilities, whereas in Rayquaza’s case, it was a large enough Mikado organ. The origins of Mega Evolution come from Delta Evolution, sothey are separate types of special evolution.
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It is unclear if this Delta Evolution is the exact same as the Delta Species from thePokémonTCG, where Delta Species Pokémon first appeared in theEX Delta Speciesset from 2005. They are Pokémon evolved to possess a different type than their original forms, like Fire-type Gardevoir and Electric-type Mewtwo. This is similar toTerastallized Pokémon fromScarlet and Violet, where trainers can change the type of their Pokémon mid-battle. TheTCGset featured Pokémon from Gen 3, so there is a possible connection between the Delta Evolution referenced in the leaks and Delta Species Pokémon.

Could Delta Rayquaza Appear In Legends: Z-A?
Delta Evolution Could Be Seen Or Referenced In The Next Legends Game
With Mega Rayquaza originally planned as a Delta Evolution, and the former being based on the latter, Delta Rayquaza could possibly be seen inLegends: Z-A. If the upcoming Legends game decides to go deeper into the story of where Mega Evolution comes from, then a Delta Rayquaza mention or even appearance is feasible. As the lore behind Mega Evolution deepens with these Rayquaza leaks, the ties between Hoenn and Kalos strengthen. WithLegends: Z-Apotentially taking place in the pastof Lumiose City,the introduction ofDelta Evolution could be uncovered and become usable by trainersfor possibly other Pokémon.
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There is also the possibility that Mega Rayquaza and Delta Rayquaza could co-exist. The Delta Evolution form could become Rayquaza’s ultimate form used in the late-game, depending on the direction of the game’s story.Rayquaza could be an important Legendary in the history of Lumiose City, since Mega Evolution deeply intertwines the two. Since Mega Rayquaza has its lore of resolving conflicts back in the Hoenn region, it would make sense if it was introduced as a way forZ-A’s story to progress and resolve.

Delta Rayquaza Lore Could Make Legends: Z-A’s Story More Interesting
The Involvement Of Delta Evolution Can Create More Lore Layers
The introduction of a specially evolved Rayquaza inLegends:Z-Acould add more story to the Kalos region. Mega Rayquaza once prevented a catastrophic aftermath by Mega Evolving to stop a conflict between Groudon and Kyogre after both were awoken by a meteorite strike.This is believed to be the origin of Mega Evolution by the Draconid people from the Hoenn regioninOmega Ruby and Alpha Sapphire. Although there are other theories within the games about the origins, introducing Delta Rayquaza and the study of Delta Evolution could make it more interesting.
In Kalos, the origins of Mega Evolution are believed to come from the legend of a trainer and their Lucario, who discovered two stones. This story indicates the first instance of Mega Evolution. With a lot of story and mystery around it,these special evolutions should be elaborated on further in upcoming games. The inclusion of Delta Evolution, also believed to originate through Delta Rayquaza in Hoenn, could also open doors to a futureLegendsgame based on the Hoenn region. It could be considered a sequel toLegends: Z-Aas well if that direction is chosen.

The leaked lore regarding Mega Rayquaza hints at a possible inclusion of Delta Evolution in the upcomingPokémonLegends: Z-A, and could possibly fully confirm the origins of the phenomenon. Revealing that Mega Rayquaza was almost Delta Rayquaza changes a lot of things regarding Mega Evolutions for both the Kalos and Hoenn regions, and could possibly connect the two further in the latest Pokémon game. If the leaks turn out to be true about Rayquaza’s lore, then trainers could see Delta Evolution introduced into the mainlinePokémongames, as similar instances have been seen in other Pokémon media.