Ultimate weapon

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AZ with the machine

The ultimate weapon (Japanese: 最終兵器 ultimate weapon) is a weapon created by AZ 3,000 years prior to the events of Pokémon X and Y, located in Geosenge Town. It features heavily in those games, and is referenced in Pokémon Omega Ruby and Alpha Sapphire as well.

The weapon has a similar shape to a flower, and it appears to be made of a crystalline material. The machine was powered by the life force of Pokémon, whose graves line Route 10. This energy source was later used by the Devon Corporation and named Infinity Energy.

History

In Pokémon X

File:Ultimate Weapon 3D.png

In Pokémon Y

Originally, the machine could only bring Pokémon back to life, and was used in that capacity to revive AZ's Floette. Exposed to the power of this machine, AZ gained immortality. AZ still wanted revenge on those who had killed his beloved Pokémon, and converted the device into a weapon that he used to end the great war by destroying both sides. When AZ's Floette realized that so many lives were lost merely to restore her own, she left AZ. The weapon was later buried deep underground by AZ's brother to try to prevent it from being used again.

In the present day, Lysandre, the boss of Team Flare, aims to use the ultimate weapon to destroy all life—including Pokémon—to create a more beautiful world. However, it could only be reactivated with the power of the Kalos Power Plant, Xerneas^X/Yveltal^Y, and the key possessed by AZ.

To accomplish this lofty goal, Team Flare occupies the Kalos Power Plant and diverts enough electricity to the weapon to cause a blackout in Lumiose City. This electricity is used along with the power of the Legendary Pokémon to reactivate the weapon, allowing it to surface once again. However, when the player catches Xerneas^X/Yveltal^Y, it drains most of the energy from the weapon. Lysandre then attempts to use what little power still remains to make the player and their friends immortal^X/destroy the secret HQ and everyone inside^Y, but the beam it launches falls back on itself, and buries the HQ and Lysandre under the rubble, leaving a crater in the center of Geosenge Town.

According to Professor Sycamore, Mega Stones are special stones such as evolutionary stones that were irradiated by the power of Xerneas and Yveltal that was fired from the ultimate weapon.

In the manga

In the Pokémon Adventures manga

In the X & Y arc, the ultimate weapon is sought after by Team Flare, who plan to unleash its power onto the Kalos region. The machine contains an Absorber (Japanese: 吸収盤 Absorber) that can drain the life force of Pokémon.

Team Flare's plan consists of capturing the Legendary Pokémon Xerneas and Yveltal so that they can drain their energy to power the machine. The two Legendary Pokémon are summoned to Vaniville Town, where they battle each other and cause panic and destruction to the unsuspecting townspeople. Team Flare watches the destruction from afar, but Xerosic notes that they have no actual methods of capturing the two Pokémon. Later, the two Pokémon end their battle and leave to parts unknown. Xerosic later finds the dormant tree form of Xerneas at Route 8. By using the captured Vaniville townspeople as mind-controlled slaves, Team Flare manages to take Xerneas to their base. After hooking the tree to the Absorber, Lysandre begins the process of absorbing Xerneas's energy.

X later travels to the Team Flare Secret HQ to stop Team Flare's plan. After arriving at the ultimate weapon's control room, he battles Lysandre. X's attempts to stop the weapon from being activated end in his defeat, but he causes Xerneas to awaken. When X's friends arrive at Geosenge Town, they find the ultimate weapon emerging from underground. They attempt to keep the weapon from opening, but it still manages to fire on the Kalos region. Despite this, the combined efforts of X and his allies drained the weapon of enough power that no innocent lives were taken.

In the Omega Ruby & Alpha Sapphire arc, another Absorber appears on the Sea Mauville. Mr. Stone and Steven Stone use the Absorber to drain the life force of Chic and Sceptile in their Mega-Evolved states so that the energy can be used to power a machine that will transport an incoming meteoroid that threatens to destroy the planet.