Can you explain more, because I am not seeing how it works better than Lugia EX donk or just splashing Lugia EX into compatible decks as a finisher?
I dont like writing too much but i guess i should. First i thought about
Lugia EX donk (basically colress machine, dce, probably ether and attack 3 times to get all prizes)
Lugia EX+ Blastoise+ techs ( see koolkidhp, Fox_Master51 and Nintendan´s Post)
In older formats cards like ability Emboar, Gatr Prime were hyped a lot but these cards didnt work well (there are obviously some reasons which dont apply to the BW-on format). I think Lugia EX donk isnt consistent. So i thought about alternatives (=victini EX).
I want to use Vicitini EX as a starter (you can use 1 or 2 Mew EX to have 5/6 starters) . i know you need your energy attachment for victini EX and you "waste" an attack, but i think its not that bad because the possibility to draw "more" important cards (supporter ,other trainers,techs) increases. I wouldnt use victini other attack but in some situations it can help a bit. I dont think victinis ace spec is good enough to use it.
So why should i use victini over Blastoise or emboar? You need less space (4 cards + up to 2 if you want to use Mew EX) i am not sure how many cards you need for blastoise or emboar because of ditto and ditto, but i doubt you need up to 6 cards for blastoise/emboar.
Aerodactyl and PP are in the deck to increase lugia damage. In theory it seems "ok" ( hey its the theorymon thread) but to be honest i think aerodactyl is just a bad idea because you rely on your luck and the effort isnt good enough. You can use other hitters (tornadus, maybe registeel EX? ) and the new poison trainer+ stadium to put the opponents pokemon into KO range for Lugia EX
i have no idea about the energy count and tbh i am too lazy to think about the energy count now because we wont get the plasma cards this year.