Zekrom absolutely rips this deck apart. They won't be able to keep up. Heres an example of a list that does well against it.
Hello all, I would like to inform you of a good zekrom build. Say what you must but this is quite possibly the most consistent and competitive deck in any given situation. This is how zekrom should be, the list is similar to most peoples list at first so bear with me and my analysis/explanation. Low basics means no lost zone worries and there is hand refreshers like juniper and judge if you need pokemon out of your hand.
4 Zekrom
2 Pachurisu
2 Shaymin
2 Cleffa
1 Unown Dark
1/1 Suicune Entei Legend
4 Pokemon collector
2 Professor Juniper
2 Judge
2 Seeker
4 Dual Ball
2 Pokemon Communication
2 Junk Arm
2 Super scoop up
2 energy retrieval
3 pluspower
1 defender
2 Switch
15 Electric
2 fire
1 rainbow
1 dark
Alright so heres how it is. 2 cleffas are such a good play. They are free retreaters meaning that you pretty much can get a zekrom out turn 1 even if you don't start with him in your opening hand. Also the hand refresher is always awesome. The big deal is Suicune Entei legend!!!!!!!!! This card has 160hp and ohko's reshiram, donphan. This card kills donphan absolutely. This card should be in all zekrom builds. It helps you beat the one autoloss you have. I cant believe people don't play unown dark in the deck, it is an amazing card. everything else is self explanatory. Give me a REAL REASON as to why suicune entei legend isnt the best play in zekrom.