Really surprised no one has posted this before. Offensive Deoxys-A Deoxys-A @ Focus Sash Trait: Pressure EVs: 252 Atk / 76 SAtk / 180 Spd Naive Nature (+Spe, -SDef) - ExtremeSpeed - Psycho Boost - Low Kick - Dark Pulse/Magic Coat/Taunt/Protect The basic jist of this is to kill your opponent in 2 attacks as Deoxys-A is an origami alien that falls when faced with a light breeze but hits back like a typhoon. Psycho Boost deals massive damage to targets that don't resist it. Low Kick or Superpower provide much needed coverage. The fourth slot can either be filled with another coverage move or some utility against status inducers (e.g. Darkrai), Fake Out users or walls(e.g. Lugia). Things that survive one attack and can prioritykill are obliterated by the second fastest ExtremeSpeed in the game. The Speed EVs outrun Modest Scarf Kyogre and Mewtwo. Other Options: - Deoxys has quite a colorful movepool, so just pick the coverage moves you want. - More Speed investment beats other Deoxys-A. Matchups: - Defensive Arceus variants survive the Low Kick + ExtremeSpeed - Other Deoxys with more Speed - Sandstorm/Hail inducers that don't die in one hit Countercoat Deoxys-A Deoxys-A @ Focus Sash Trait: Pressure EVs: 252 HP / 252 Spe / 4 Atk Jolly (+Spe -SpA) - ExtremeSpeed - Counter - Mirror Coat - Taunt Do I really have to say anything about this? Something stares at you - Deoxys falls to 1 HP, Counters back for instantkill or near Death - finish with ES. Taunt for enemies that don't try to attack you. Other Options: - Protect against Fake Out users and to find out what kind of attack the opponent might use (like Rayquaza). Matchups: - Things that break through Sash, e.g. Fake Out, Sandstorm/Hail or multi hit moves - Special Dark types, as Mirror Coat doesn't affect them.