This is a bulky request, but I'd love you if you did it!!
Gardevoir @ Gardevoirite Ability: Trace EVs: 24 Def / 232 SpA / 252 Spe Modest Nature IVs: 0 Atk - Hyper Voice - Psyshock - Focus Blast - Taunt
Keldeo @ Choice Specs Ability: Justified EVs: 252 SpA / 4 SpD / 252 Spe Timid Nature IVs: 0 Atk - Scald - Hydro Pump - Secret Sword - Hidden Power [Electric]
Tyranitar @ Smooth Rock Ability: Sand Stream EVs: 248 HP / 156 Atk / 104 SpA Brave Nature - Ice Beam - Stone Edge - Pursuit - Stealth Rock
Excadrill @ Air Balloon Ability: Sand Rush EVs: 252 Atk / 4 Def / 252 Spe Adamant Nature - Earthquake - Rapid Spin - Rock Slide - Iron Head
Ferrothorn @ Leftovers Ability: Iron Barbs EVs: 252 HP / 88 Def / 168 SpD Relaxed Nature IVs: 0 Spe - Leech Seed - Protect - Power Whip - Gyro Ball
Latios (M) @ Life Orb Ability: Levitate EVs: 252 SpA / 4 SpD / 252 Spe Timid Nature IVs: 29 HP / 0 Atk / 30 SpA / 30 Spe - Roost - Psyshock - Draco Meteor - Hidden Power [Fire]
Items are definitely not required, but greatly appreciated!