From Bulbapedia, the community-driven Pokémon encyclopedia.
New Island (Japanese: ニューアイランド New Island) was the location of a secret Team Rocket laboratory in the anime. It is identified as the location of Mewtwo's creation, and later, the location of his fortress (referred to as "Pokémon Palace" by a possessed Nurse Joy in Pokémon: Mewtwo Strikes Back—Evolution).
The island was given to Dr. Fuji as part of a research grant from Team Rocket's boss, Giovanni, who intended for Fuji to use his previous research into cloning and genetic manipulation to create an enhanced clone of Mew. As Fuji had recently lost his daughter, Amber, he had been intending to clone her to bring her back to life.
Though Amber's clone died, as did clones of the Kanto first partner Pokémon, the clone of Mew, Mewtwo, still young, survived. To calm him after the loss of his friends, he was injected with a substance that would make him forget. Eventually, Mewtwo was mature and fully grown. He sensed the scientists outside of his tube and shattered it to take his first breath. The scientists were thrilled at Mewtwo's existence; however, they did not see Mewtwo as a living being worth respect, but only as the end result of their experiment. Because he had lost its compassion, he destroyed them for their ignorance and was discovered among the burning wreck of the lab by Giovanni, who took him back to Viridian City to use.
Eventually, after discovering that Giovanni, too, saw him only as a tool, Mewtwo escaped, destroying Team Rocket's facility near Pallet Town and the metal suit that restricted his powers. Returning to New Island, he rebuilt the laboratory and called on the best Trainers in the land to join him for a challenge, intending to clone their Pokémon and prove that the originals were no match. After seeing Ash's sacrifice to stop the fighting, though, Mewtwo changed his mind and sent the Trainers home, abandoning New Island once more. When it was last seen, only the Team Rocket trio that follows Ash around remained on the island, which is now completely covered in vegetation and devoid of the palace.
Celestial
New Island appeared in the music video for Celestial by Ed Sheeran. In it, Mewtwo and Mew battled against each other in the island's stadium as Ed Sheeran arrived on the island via his Charizard. The battle escalated to the point Mewtwo's powers destroyed much of the infrastructure. Ed Sheeran's Pokémon worked to keep the damage in check while Sheeran raced to stop the two Legendary Pokémon. He was ultimately hit by two blasts the Pokémon were aiming at each other, causing a large explosion.
The original lab on New Island
New Island after being abandoned
The entrance hall to Mewtwo's castle
Mewtwo's Stadium
Mewtwo's lab
Mewtwo's clone Pokémon in their tubes
Aerial shot of Stadium
In other languages
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