Darkrai/Sableye was a Pokémon Trading Card Gamedeck archetype regarded by many as the best deck in the format of the 2012-2013 season, also being a played contender in the 2011-2012 and 2013-2014 season. The deck's strategy revolved around stalling the opponent with disruptive Trainer cards and recycle these resources while the player would charge up BenchedDarkrai-EX to later attack, but also being able to attack the first turn with stalling cards for the next turns. With a constant attendance during the season, Darkrai/Sableye players took 1st place in the Masters Division and 1st place in the Junior Division at the 2013 Pokémon Trading Card Game World Championships, as well other important titles at official events. Masters champion Jason Klaczynski's version was printed as a promotional World Championships deck, Darkrai Deck.
Darkrai/Sableye focused on charging benched Darkrai-EX without being attacked by the opponent's Pokémon, playing Crushing Hammer and Enhanced Hammer to remove energy cards and Dark Patch as energy acceleration. The differential of this deck is to use Sableye's Junk HuntAttack to put back discarded Item cards in the player's hand, being able to reuse these resources, plus searching and drawing Items, in the next turn. It could also be fast at getting enough energies on the first turn to start the match with Darkrai-EX's attack.
As a Pokémon that only gives one prize card when knocked out, Sableye forced the opponent to knock out the same number of Pokémon-EX to win the prize card race when brought down as if the opponent did not get a prize card. Due to Junk Hunt, Darkrai/Sableye could often play as a control deck by discarding all energies from the opponent's deck. Darkrai-EX's Dark CloakAbility offers further mobility to the list, preventing it being in the active position at the first turn to be a so disfavorable start. A player could attach an energy to Darkrai-EX, retreat to Sableye by the Ability's free cost and move that energy with Energy Switch to use Junk Hunt. The same could happen backwards, where benched Darkrai-EX could even attack the first turn with an attchment to the active Pokémon, at least two Dark Patches and a retreat/Energy Switch.
Hypnotoxic Laser became an useful addition when released as it would get the opposing Pokémon's Hit Points low enough to be knocked out with one attack and often asleep them.
Darkrai-EX - Darkrai-EX's Night Spear attack dealt 90 damage to the active Pokémon plus 30 damage to a benched foe. Its Dark Cloak Ability allowed free retreat for Pokémon with energy attached, also keeping these energies on the field.
Sableye - Sableye's Junk Hunt attack put two Item cards from the discard pile to the player's hand without a drawback or luck-based use. It could rarely use Confuse Ray to try confusing the defending Pokémon or knock it out when badly damaged.
Keldeo-EX - Its Rush In Ability sinergized well wih Darkrai-EX's Ability, removing special conditions and harmful effects while allowing Dark Patch to be used on the previous active Pokémon.
Crushing Hammer - Although Crushing Hammer needed a coinflip to discard an energy in play, being able to retrieve it with Sableye to test luck again made it viable enough for most decklists.
Enhanced Hammer - A guaranteed energy disruption against special energies, which were common during the whole 2012-2013 format.
Dark Patch - Dark Patch attached a discarded energy to a benched Pokémon. A similar Item card would only be released when this deck was long gone out of the Standard format, making it unique for the whole season.
Energy Switch - Moved energies between Sableye and Darkrai-EX to use Junk Hunt and Night Spear as quickly possible. Other use could be to move energies from damaged Darkrai-EX to a newer attacker.
Dark Claw - Dark Claw increased the attacks of by 20. It was dropped with the end of the 2011-2012 season and became relevant again once Pokémon with 100-110 HP became slightly common in the format and Hypnotoxic Laser had been released.
Hypnotoxic Laser - Poisoned Pokémon with a chance to also cause them to fall asleep. Along with Virbank City Gym, it was possible to weaken the defending Pokémon's HP while charging up Darkrai-EX and knock them out in one Night Spear attack, or between turns.
Professor Juniper - Along with Ultra Ball, Professor Juniper was an easy way to discard energies to use Dark Patch while getting useful resources.
Darkness Energy - Each attached special Darkness Energy increased the attack of that Pokémon by 10.
Jason Klaczynski's decklist at the 2013 World Championship