Dark types took a hit from losing their Special Energy. But Dark Explorers helped make up for that. This is a mono-dark deck. It goes for those heavy hits.
x2 Sandile: http://serebii.net/card/darkexplorers/064.shtml
-Needed for evolution.
x2 Krokorok: http://serebii.net/card/plasmafreeze/069.shtml
-Has a one for 20 at least. Needed for evolution.
x2 Krookodile: http://serebii.net/card/darkexplorers/066.shtml
-150 HP and Psychic resistance makes this a hard guy to take down. And it takes down foes hard. Either in one turn or in two. Probably two prizes have been taken by the time Krookodile comes out. So 80 damage. Not enough to KO the foe. But first use the 60 damage attack and prevent them from escaping. Then KO them the next turn. Late game this guy is incredibly powerful. With three prizes it can 2HKO EX cards. With five prizes it can OHKO the entire game under most situations. It'll take a Giant Cape Wailord to survive. The three retreat cost is taken care of by Darkrai.
x3 Vullaby: http://serebii.net/card/emergingpowers/068.shtml
-While less HP than some of the other Vullaby, it makes up for it with Rear Guard, allowing it to stall early on. It has Fighting resistance, which is great for the deck.
x2 Mandibuzz: http://serebii.net/card/emergingpowers/069.shtml
-I love me my potentially infinite damage attacks. And if it also comes with a two for 20 that does 10 more damage for each Dark Energy I have out, all the better. Plus this gal has Fighting resistance.
x2 Zorua: http://serebii.net/card/darkexplorers/069.shtml
-Easily brings out Zoroark.
x2 Zoroark: http://serebii.net/card/darkexplorers/071.shtml
-Has a two for up to 120 and a two for up to 180. Need I say more?
x3 Absol: http://serebii.net/card/plasmafreeze/067.shtml
-100 HP basic, Psychic resist, and one retreat. Nice 20 for two that does 20 more for each Pokemon on the opposing bench. Also a three for 60 that lets me look at my opponent's hand.
x2 Darkrai EX: http://serebii.net/card/darkexplorers/107.shtml
-Gives my Pokemon free retreat. Also has an excellent three for 90 that does 30 damage to a benched Pokemon. Oh, and 180 HP. Can't forget that.
x4 Dark Claw: http://serebii.net/card/darkexplorers/092.shtml
x4 Pluspower: http://serebii.net/card/blackwhite/096.shtml
-EVEN MORE DAMAGE!
x4 Iris: http://serebii.net/card/megalocannon/071.shtml
x4 Pokemon Catcher: http://serebii.net/card/emergingpowers/095.shtml
-Forces out the Pokemon I need.
x3 Ghetsis: http://serebii.net/card/plasmafreeze/101.shtml
-Lass and drawing.
x2 Pokemon Communication: http://serebii.net/card/blackwhite/099.shtml
-Gets me the Pokemon I need.
x2 Silver Mirror: http://serebii.net/card/megalocannon/069.shtml
-Allows me to deal with EX cards easily.
x1 Computer Search: http://serebii.net/card/boundariescrossed/137.shtml
-Gets me the card I need.
x16 Dark Energy