Rayquaza is a legendary dragon- and flying-type Pokémon of Hoenn. It is one of the Ancients, along with Kyogre and Groudon, and its domain is the atmosphere. It slumbered on the rooftop of Sky Pillar before being awoken by Wally.
Rayquaza was sleeping on the top of Sky Pillar.
Rayquaza officially debuts in Chapter 258.