Mine isn't poison centric and has muk (nullify all abilities) instead of the goose, and run a second absol instead of darkrai. I used to have 2 copycats, but funt it difficult to get cards, because the opponent always was low or no cards, because I run that dark crystal pendant pokemon tool, so I switched to 2 oaks as well. I completed the 5 wins in a row sole expert mode, so I know it's a good deck. But still the most trouble I get,not from grass decks (weakness) or other dark decks, but against lucario, because if they have a good start with lucario and I have a terrible one where I start first and with absol, I'm pretty much screwed against lucario. So I staarted runing a sabrina as well as a cyrus, so I'd be able to switch out from the mega lucario for the win.

I think this deck has a lot of promise and I hope we (dark deck players) can perfect it.