waynegg
4 Mew
3-3 Yanmega
2-1-2 Serperior
2 Absol
2 Crobat
2 T-tar
2 Jirachi
1 Unown (Dark)
4 Junk Arm
4 Pokemon Collector
3 Copycat
3 Pokemon Communication
3 Twins
2 Judge
2 Max Potion
2 Pokemon Catcher
2 Rare Candy
3 Psychic
3 Rainbow Energy
3 Rescue Energy
2 Dark (special)
While competing this season I've faced a variety of decks. One in particular inspired this build which consisted of Kingdra Prime, Absol Prime, and Yanmega Prime. It was a very solid deck which made top cut, but while facing it I couldn't help but think it could be a bit better if it had more synergy. Mew in the place of Kingdra really seemed to fill that bill.
Optimally, starting with Absol is your best choice. Normally I would run a 4 of for a starter, but Absol becomes a bit of a liability past the early game. With the free retreat you get from Mew and Yanma Absol can just be searched on T1 if it isn't in your opening hand and promoted without losing your energy attachment for the turn. His PokeBody makes for great early spread of 20 to each basic your opponent benches without even having to attack. 70+ possible on T1 is also formidable. I know my challenge wasn't to donk, but hey, if you can bring it to the table (ala Unown DARK) while still covering my challenge why not?
Absol has perfect synergy with Mew, which should work out to be your key attacker, in that while Absol is spreading and donking, it is also throwing Pokemon into the Lost Zone so that even a single Mew doesn't have to be wasted to the task. This way your Mew comes up swinging. All you have to do is target your opponent's highest cost retreater with Catcher (and every deck, aside from MewBox, has one of these whether Basic, Stage1, or Stage2), poison it with a LZ'd Crobat, and then spread with the LZ'd Tyranitar. Serperior steps in to keep all that spread off you while your opponent takes it in the face.
Yanmega comes in to do exactly what Yanmega does- snipe the weakened bench Pokes and finish off the maimed attackers. Jirachi comes in on the stage2 decks by dropping for a few energy via its PokePower and then attach for the turn to devolve kill a some of your opposition.
Since all the meta deck shave the same general, high retreat energy hog that will fall to the Catcher/Poison loop and the strategy works essentially the same for them all, I'm only going to break down the mirror.
Early Absol in the mirror is clutch. Hitting already low HP Pokemon for 20 just for the privilege of being on the bench is devastating. Your opponent is forced immediately into recover mode from the very start. They literally have the choice of set up and put everything they bench into immediate peril, all while simultaneously losing the early prize advantage. Otherwise they can choose to forgo the set-up, praying for a Catcher to knock the Absol to the bench, and equally praying they don't lose the wager as their lone Pokemon is Knocked Out. Once you get the early lead you just don't relent on the T-Tar spread and your opponent isn't able to recover.