Rayquaza (Special Set)
Sp.atk and Spd EV's
Draco Meteor/Dragon Pulse - STAB, covers dragon weakness
Air Slash - STAB, coverage decent power and a good chance of causing the foe to flinch.
Focus Blast - Covers 2 weaknesses, and crazy power and a chance to lower the foes Sp.def.
Earth Power - Large range of coverage, chance to decrease foes Sp.def.
Rayquaza is an absolute beauty, this set is about coverage and decreasing the foes Sp.def, which is either useful and/or needed dependent on if you choose Draco meteor or Dragon pulse, your gonna have to choose between the two but either is fine.
Rayquaza (physical set)
@persim berry/choice scarf
Proud of its power
Atk and Spd EV's
Outrage/Dragon Claw - STAB, crazy power, covers dragon weakness
Stone Edge - great power, high critical hit ratio, coverage.
Earthquake - great power, accuracy, coverage.
Swords Dance/ Dragon Dance - sharply raises Atk, or raises Atk and Spd
This set is also pretty good, covers all weaknesses and allows for a boost in Atk and/or Spd, really a power set, also if you choose Outrage, then pick the persim berry as your item, otherwise choice scarf to make for a dangerous sweeper.
Likes to run
Spd and either Atk or Sp.atk EV's
Draco meteor - STAB, covers dragon weakness.
Iron Tail/Head - coverage of weaknesses (including fairy).
Earthquake - its Earthquake dude...
Air Slash - STAB, decent power and decent chance to flinch the foe.
This set is aimed for Rayquaza to be fast as heck and flinch the foe and just kill anything it crosses, because a dragon type move is hardly called for, Draco meteor works in this set for a powerful fast strike, plus the decrease in the Sp.atk doesn't affect the rest of the set, air slash is there just to flinch the opponent, and to handle Pokemon with the ability sturdy, this set is just there for competitive purposes, its is an annoying set to verse that does crazy damage and covers alot of types.