Background Information - Rayquaza! The King of Epic Pokemon Moments!
If you asked me which Pokemon that GameFreak and their partners have problem been giving too much love, surprise that it's not a Kanto Pokemon. It's Rayquaza who is at the highest level of badassery, arguably having more epic moments than any other Pokemon throughout the series and one of the earliest memorable moments is when Rayquaza debuts in the Pokemon games first ever cinematic cutscene that isn't an intro sequence, swooping down to tell Kyogre and Groudon to knock it off. In the Pokemon Adventures manga, we saw Wally on a quest to awaken the legendary dragon who is so powerful that Groudon and Kyogre tremble before it's awesomeness. And who could forget Destiny Deoxys where we saw the first time that Rayquaza's rivalry with Deoxys would be cemented for years to come! And surprise, surprise, Rayquaza gets an absolutely broken Mega Evolution and his badassery levels are pushed further than one would think, cementing Deoxy's rival as part of the game's canon but in SPACE! An awesome sequence of events that would later be recreated in Pokemon Generations and Pokemon Adventures ORAS, to display Rayquaza's badassery in animation or a more story expanded medium. Then there's of course the anime where the XY series does justice to Groudon & Kyogre that the Advance series couldn't, establishing Groudon and Kyogre as these forced of nature that's difficult to understand by man before Rayquaza swoops in like a jet plane and scares the two. And this is not even counting the spin-offs such as the time Rayquaza destroyed a world-destroying meteor in the Mystery Dungeon... wait a minute... world-destroying meteor? Looks at Mystery Dungeon and looks at Delta Episode... huh... interesting. Anyways, Rayquaza is the definintion of epic moments!
Well-Known Trainers who befriended Rayquaza
Brendan/Ruby - Pokemon games, Pokemon Adventures
May/Sapphire - Pokemon games, Pokemon Adventures
Norman - Pokemon Adventures
Wally - Pokemon Adventures
Ash Ketchum - Pokemon anime
Rayquaza Physical Set
Mega Rayquaza or Rayquaza
Item: Flyinum Z/Focus Sash
Ability: Delta Stream or Air Lock
Nature: Adamant (Atk, - Sp. Atk)
EVs: 252 Atk/252 Speed
Dragon Ascent or Dragon Dance (regular Rayquaza)
Outrage or Dragon Claw
Earthquake
Extreme Speed
Straightforward destroy everything set
Rayquaza Special Set
Mega Rayquaza or Rayquaza
Item: Life Orb/Grassium-Z/ Fightinum-Z
Ability: Delta Stream or Air Lock
Nature: Modest (Sp. Atk, - Atk)
EVs: 252 Sp. Atk/252 Speed
Dragon Ascent or Air Slash
Draco Meteor
Flamethrower
Energy Ball
/Focus Blast
Straightforward destroy everything set, regular Rayquaza having a bit more coverage on either bulky water or annoying ice-types.