A tech is a card that's not a card that your deck needs to function properly, but you add in to improve a matchup or to serve some other purpose. In this case, not having Espeon-GX won't stop the deck from functioning, but you tech it in to get more consistent KOs late game.
Have you seen the new Decidueye EX? Running a 3-3 line perhaps for serious damage counter drops can set the opponent's board for multiple KOs with Espeon GX.
So I re made my alakazam deck with espeon-gx and I now run 3 shaymins and 3 lillies and I ran thru the deck like crazy... I really like how it runs more testing is needed will put a deck list up in the deck garage later on tonight.
That's awesome I was hoping alakazam deck would make a statement in the game but variations just weren't holding up now it looks like alakazam will have his time to shine again just like back in the day with damage swap decks. The only thing I would do is run Lillie in the deck. It's a suggestion you don't have to that's just me though.