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{{AnimeLocationInfobox
|name=Grand Meteor Delta
|image=Grand Meteor Delta.png
|characters=グランメテオΔ
|japanese=Grand Meteor Delta
|region=Hoenn
|epicode=PAORAS02
|episode=Omega Ruby & Alpha Sapphire chapter
|colorscheme=ORAS}}
'''Grand Meteor Delta''' (Japanese: '''グランメテオ{{tt|Δ|デルタ}}''' ''Grand Meteor Delta'') is a gigantic meteoroid that appears in {{g|Omega Ruby and Alpha Sapphire}} and the [[Pokémon Adventures]] manga.

==In the games==
In the games, Grand Meteor Delta is an unnamed giant meteoroid that is on a collision course with the planet. The plot of the [[Delta Episode]] is finding a way to destroy the meteoroid and save the world from being destroyed.

The {{player}} is enlisted by {{Steven}}, [[Mr. Stone]], and the staff at the [[Mossdeep Space Center]] in assisting with the launch of a rocket containing [[Infinity Energy]] in order to power a device known as the dimensional shifter. The shifter was outfitted with a Link Cable that would cause the meteoroid to be warped to another location. Where the meteoroid would end up was unknown, but the people working with the plan did not care as long as it was sent away.

The plan was stopped by the [[Draconid people|Draconid woman]], [[Zinnia]], who was against their plan due to the rocket being fueled by Infinity Energy and the possibility of there being {{game|Ruby and Sapphire|s|another Hoenn}} that would be unable to defend against the meteoroid should it be warped to that Hoenn. Zinnia had her {{p|Whismur}}, Aster, steal the dimensional shifter and crush it, thus putting an end to the plan.

At the [[Sky Pillar]], Zinnia reveals to the player that her people, the Draconids, have foreseen the arrival of the meteoroid. Zinnia uses the power of give [[Key Stone]]s to summon {{p|Rayquaza}} in order to [[Mega Evolution|Mega Evolve]] it and destroy the meteoroid. Although successful, Zinnia is unable to Mega Evolve Rayquaza, as its mikado organ did not have enough energy to allow it to become Mega Rayquaza. By feeding Rayquaza the {{key|VI|Meteorite}} they possessed, they player gives Rayquaza enough power to allow Mega Evolution. After battling and capturing Rayquaza, the player dons the {{key|VI|Magma Suit}}{{sup/6|OR}}/{{key|VI|Aqua Suit}}{{sup/6|AS}} and rides Rayquaza out to space to destroy the meteoroid.

After the meteoroid is destroyed, a triangular object emerges from the middle of the debris, which soon opens to reveal the [[Mythical Pokémon]] {{p|Deoxys}}, who immediately engages the player in a battle. Should Deoxys be defeated or captured, the threat to the planet is finally over, thus ending the Delta Episode. 

==Pokémon==
{{Catch/header|space|no}}
{{Catch/entryoras|386|Deoxys|yes|yes|Special|80|One|type1=Psychic}}
{{Catch/footer|space}}

==In the manga==
===In the Pokémon Adventures manga===
In Pokémon Adventures, the unnamed meteoroid is given the name Grand Meteor Delta. It is the primary focus of the {{chap|Omega Ruby & Alpha Sapphire}}, where three different factions fought each other for the right to destroy the meteoroid.

The first faction were the Draconid people, who used the power of legends. The Draconid people foretold of Grand Meteor Delta's appearance thousands of years prior to the start of the chapter. Their chosen Lorekeeper, [[Aster]], was destined to ride {{DL|Super-ancient Pokémon (Adventures)#Rayquaza||Rayquaza}} and destroy Grand Meteor Delta, at the cost of her own life. However, Aster died in battle against the [[Devon Corporation]] in order to prevent them from capturing Rayquaza and use its power to protect Hoenn should {{p|Groudon}} and {{p|Kyogre}} be awakened. These events led Zinnia, another Draconid that became Aster's successor, to harbor a grudge against Devon.

The second faction was the [[Devon Corporation]], who used the power of science. Grand Meteor Delta was discovered by Professor Cozmo and his assistants at the Mossdeep Space Center. The Space Center then began working with the Devon Corporation to produce a rocket and dimensional shifter that would be powered by Infinity Energy. These items, when combined, would warp the meteoroid away to another location. When Zinnia learned of this, she sent Devon a letter warning them to stop their plans or her people would attack them. In order to prevent Zinnia's attack, Steven enlisted the help of the Hoenn [[Pokédex holder]]s, {{adv|Ruby}}, {{adv|Sapphire}}, and {{adv|Emerald}} in helping with the production of the dimensional shifter. After preventing Zinnia from destroying the shifter once it was filled with the life energy from Sapphire's [[Chic]], and Emerrald's {{TP|Emerald|Sceptile}}, the dimensional shiter was taken to [[Mossdeep City]], where it was outfitted to the rocket. When Zinnia staged another attack, this time being the rocket itself, Sapphire fought her in order to prevent the rocket from being destroyed. After a battle on top of the rocket, Sapphire was defeated by Zinnia, who proceed to destroy the dimensional shifter and knock the rocket into the ocean.

The third faction was [[Maxie]] and [[Archie]], wo used the power of nature. Long thought to be dead, Maxie and Archie returned to Hoenn with the [[colored orbs|Red and Blue Orbs]] stolen from {{adv|Bill}}. These, combined with Groudon and Kyogre, allowed the two Super-ancient Pokémon to achieve their [[Primal Reversion|Primal form]]s. After gaining this new power, Maxie and Archie trained together in order to teach Groudon and Kyogre {{m|Precipice Blades}} and {{m|Origin Pulse}}, respectively. Once finished, Maxie and Archie teamed up with Ruby and Sapphire, who had befriended Rayquaza, in order to stop a large piece of Grand Meteor Delta that had broken off and fell toward {{rt|120|Hoenn}}. Although they fought hard, the three Super-ancient Pokémon struggled against the meteoroid piece and only barely managed to destroy it. The event ran through the energy keeping their bodies stable, causing Maxie and Archie to break apart and disappear once more. The pieces of the meteoroid fell down on top of Groudon and Kyogre, knocking them unconscious and reverting them back to their base forms.

After her attempts to convince Rayquaza to join he were rejected, Zinnia gave up in despair and claimed that she wasn't strong enough to succeed over Aster. This attitude angered Emerald, who stated that the three factions should work together instead of stubbornly trying to destroy Grand Meteor Delta by themselves. The three sides agreed and began working on a plan to stop Grand Meteor Delta together. With the help of allies from Hoenn, Kanto, and Johto, the plan to stop Grand Meteor Delta was finalized.

After putting on the {{key|VI|Magma Suit|Magma}} and {{key|VI|Aqua Suit}}s, Ruby and Sapphire went into space with Rayquaza. Upon coming face to face with Grand Meteor Delta, Ruby and Sapphire Mega Evolve Rayquaza and command it use Dragon Ascent. The attack, along with the combined forces of allies from Hoenn, Kanto, and Johto, successfully destroys Grand Meteor Delta by shattering it into pieces. However, out from the meteoroid's wreckage emerges a Delta Shield, which opens to reveal a {{DL|Deoxys (Adventures)|Organism No. 1|Deoxys}}, that proceeds to attack the three. After a tough battle, Ruby and Sapphire have Rayquaza strike Deoxys's core, shattering it and knocking Doexys unconscious, causing it to begin floating to the depths of space. Afterward, Rayquaza grabs Ruby and Sapphire and takes them back down to Earth to reunite with their friends.
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