This dark type based deck uses Gapejaw Bog to get consistent damage counters on your opponent's pokemon for massive damage from M Tyranitar EX. Hydreigon is used for it's dark squall ability allowing you to get lots of energy to your pokemon. Darkrai Vstar is also a heavy hitter when paired with Hydreigon's energy driving ability. Edited:
Munkidori can be used to get rid of damage counters on your Pokemon and put them on the opponents' to get a 1HKO every time with Mega Tyranitar.