Blastoise, Black Kyurem EX, Keldeo EX

[SpaceCowboy]

Pokemon x20

• 
  [1] Black Kyurem EX (boundaries crossed)
  [1] Keldeo EX (boundaries crossed)
  [2] Blastoise (boundaries crossed)
  [2] Wartortle (boundaries crossed)
  [3] Squirtle (boundaries crossed)
  [1] Vanilluxe (Plasma Freeze)
  [2] Vanillish (Plasma Freeze)
  [2] Vanillite (Plasma Freeze)
  [2] Noctowl (Plasma Freeze)
  [2] Hoothoot (Plasma Freeze)
  [1] Keldeo (boundaries crossed)
  [1] Milktank (Plasma Freeze)

Trainers x23

• 
  [1] ACE Crystal Wall
  [4]Energy Search
  [4] Switch
  [2] Energy Retrieval
  [2] Cheren
  [3] Great Ball
  [3] Pokemon Communication
  [3] Rare Candy
  [1] Skyla

Energy x17

• 
  [13] Water Energies
  [4] WLFM Blend Energies

Strategy

So basically the strategy is to pump up Keldeo EX and Black Kyurem EX With the Blastoise. This is my little brothers deck so dont be too ruff with the critisim cuase these are the pokemon he wants to play for the most part, but advise is helpful so thanks! Also We are thinking of adding a Kyogre EX.

 

[Serperior]

So let's get the basic stuff out of the way. Your main strategy is to beef up your Black Kyurem and Keldeo to hit for tons of damage. First, cut the stuff you don't need. This would mean the Miltank, Noctowl, and Vanilluxe lines, because they decrease consistency. Add more Squirtle and Blastoise, and run Computer Search, your ACE SPEC, and four Professor Juniper. You'll find that you won't need four Switch because Keldeo's Rush In gets the job done just fine. Cut two for another Keldeo and a fourth Rare Candy. You don't need the Energy Search, (but a one-of is nice as a tech), so take three out for two more Skyla and an N. You'll need to max out the N, Catcher, and Energy Retrieval. Cut the Blend Energy because they're not needed.

 

[SheNinja]

Let's look at the Energy:

13 Water. Okay, that is too much. You only need 9-11 to be consistent while not having too many. You can have more slots to use elsewhere.
4 Blend WLFM. Not needed. Only water should be needed, plus 2-3 Lightning for BK-EX.