A GOOD deck.
There's your answer.
It sounds stupid at first, but, when you show up to a tourney, you have a deck that WINS more than LOSES regardless right? So, do you.
EVERYONE will have Pokemon knocked out NO MATTER WHAT your deck is.
The thing is, do you have a plan A B and C or are you just planning on building up to ONE BIG BLASTING character and hoping he lives forever?
It's NOT the DECK... it's how you build it and HOW YOU PLAY IT.
I've seen a clever Swampert deck take down AMU... I've seen Kingra take down AMU, I've seen MewTwoX (3-1) take it down...
on that same note, I've seen AMU beat alot of decks too.
It's not always the list man ...
It's the player.
Build a scheme that MAKES SENSE TO YOU.
Understand YOUR mechanics
and FOR THE LOVE OF ALL THAT IS GOOD AND HOLY ....
Stop trying to SNATCH a LIST and plug-n-play a deck all of the time!!!!
It's fun to be creative folks...