Rayquaza

Rayquaza (レックウザ Rayquaza) is a /-type Legendary Pokémon.

Rayquaza is the version mascot for the game Pokémon Emerald.

Anime
Rayquaza appears in the 7th movie, Destiny Deoxys. It flies down from the ozone layer, blasting out Hyper Beam to "help" the world against Deoxys, who was trying to find its friend, who was still in the form of a green crystal, a couple of scientists were trying to revive it. In the film, Deoxys can't tell if Rayquaza is trying to help the world or destroy it, and vice versa. Rayquaza appears later in the opening for Pokemon: Galactic Battles, but it appears to be seen in high orbit.

Games
Rayquaza is a Generation III Pokémon, first appearing in the Pokémon Ruby and Sapphire games. In 2004, Rayquaza became the version mascot for the Pokémon Emerald game. In all three games, Rayquaza can only be obtained at the Sky Pillar.

In Hoenn region mythology, it was said to stop the fighting between Groudon and Kyogre. Rayquaza in Ruby, Sapphire, and Emerald can be found at the Sky Pillar. It lives in the ozone layer far above the clouds and cannot be seen from the ground. It is noted for protecting its territory fiercely.

Rayquaza is Level 70 when you face it in Pokémon Ruby/Sapphire/Emerald, it has starting moves of Extremespeed, Outrage, Rest and Fly.

Super Smash Bros. Brawl History
Rayquaza is the second main boss you have to fight in Super Smash Bros. Brawl. You fight it as Fox or Diddy Kong in the Subspace Emissary.