I disagree with literally everything you said. Trick Coin wouldn't help Lugia in any way whatsoever because it doesn't use coin flips. Kyurem EX is a bad idea because then you have to run two different energy types, and you wouldn't be able to accelerate to Kyurem making you need THREE TURNS to set it up, and you wouldn't get the advantage of Item lock that Trevenant gives you. Trevenant also uses the same type of energy as Alakazam and can attack for one energy with Dimension Valley in play. A Gengar deck would also not be a good idea, because having to set up a mega and a stage two just to knock out one Pokémon only to have your opponent knock out your stage two next turn is just not a good strategy. You'll get outsped and overwhelmed by other decks in the format. Trevenant is different because the Item lock slows your opponent down and Alakazam and Trevenant can both take Knockouts for you without having to retreat between them.