Unlike previous Mega EX cards from the XY and Omega Ruby/Alpha Sapphire eras, these new Mega Evolution ex cards are Stage 2 Pokmon, evolving from their pre-evolutions (such as Kirlia)
The full step-by-step is in our guide on how to tell if a Pokmon card is fake
That ship sailed a long time ago
I eventually lost in the Top 2 to my brother
Some of these decks also run Through the Breach as a backup plan
I might be able to see this perspective if the only counterfeiting problem involved dual lands, Power Nine cards, and other absurdly expensive, unreprintable Reserved List cards, but the demand for counterfeit Standard cards, $15 Commander cards, and Pauper staples works against the argument that the fake card problem is just about $600 Underground Seas and $2,500 The Tabernacle at Pendrell Vales