I was recently looking through the X and Y set scans on Pokebeach.com, and I came across a few interesting ideas along the way. First, most of these aren't based on the new EXes, since Yveltal is the only one that doesn't suck compared to currently used ones. I have no idea how well these decks will do next format, or if they will even be used. I'm just spreading my ideas to others, to get comments on how much potential you all think these decks could have. The first idea is Aegislash/Keldeo EX. Aegislash with King's Shield does 50 damage for MMCC, and protects itself from all damage from attacks by any Pokemon during your opponent's next turn after using the attack. However, it can't use King's Shield during your next turn. Then Keldeo saves the day by Rush-In-retreating back to Aegislash, so he can use King's Shield for 50 more damage and more protection again and again. Victini EX can be used for immediate acceleration if needed. http://bulbapedia.bulbagarden.net/wiki/Aegislash_(Collection_Y_41) The second deck idea is based around Gourgeist and Hypnotoxic Laser/Rocky Helmet. Gourgeist has an attack named Soul Scream, which puts damage counters on both Active Pokemon until they each have ten HP left, for the cost of PP. Comboed with Hypnotoxic Laser for poison, this attack will knock out your opponent's Active regardless of its HP, similar to Raticate from Plasma Storm. Of course, your Gourgeist will also have 10 HP remaining, tempting your opponent to attack it and take the prize. This will probably happen, but if you choose not to poison their Active, or you don't have access to a Laser at the time of attack, you can instead attach a Rocky Helmet or maybe even Rock Guard to your Gourgeist, so if you get attacked by the opponent's Soul Screamed Active Pokemon, that Pokemon will also be knocked out. This could possibly help you gain the lead in the Prize trading. Gardevoir NXD can help with quick acceleration if needed. http://bulbapedia.bulbagarden.net/wiki/Gourgeist_(Collection_Y_28) My third idea was using Vivillon as a main attacker, with Victini EX for setup early game. Vivillon's Colorful Wind attack does a base 30 damage, plus 30 more for each different type of basic Energy attached to it at the time, for CCC. With 5 different types attached one way or another, this attack does 180 damage, and it caps out at an overkill 300 damage if you have all 9 different types of basic Energy attached to it at once. You could also try a fun varient of the deck with Ho-oh EX, accelerating from the discard pile. Then use Mew EX's Replace attack to move the Energy cards to either Mew EX or Vivillon, then retreat to Vivillon or attack with Mew EX to use Colorful Wind. This is less consistent and much more luck based, however. http://bulbapedia.bulbagarden.net/wiki/Vivillon_(Collection_X_8) My fourth idea is a Fairy toolbox-esque deck. Xerneas's Geomancy attack for Y attaches a Fairy Energy from your deck to each of two of your Benched Pokemon. Slurpuff protects all of your Pokemon with any Fairy Energy attached from any Special Conditions, similar to Virizion EX, and Aromatisse allows you to rearrange any Fairy Energy cards on your side of the board as often as you like, similar to Klinklang, Hydreigon, and Porygon-Z. Aromatisse gives you easy access to the use of Max Potion, so you can tank with Xerneas EX or any other colorless-cost Pokemon EXes. Xerneas EX can also do some significant damage turn after turn, gaining you the knock outs you need to win. http://bulbapedia.bulbagarden.net/wiki/Xerneas_(XY_96) http://bulbapedia.bulbagarden.net/wiki/Aromatisse_(Collection_Y_45) http://bulbapedia.bulbagarden.net/wiki/Slurpuff_(Collection_X_43) http://bulbapedia.bulbagarden.net/wiki/Xerneas-EX_(XY_97) Lastly, I had the idea of tanking like crazy with Sigilyph PLB, using 4 each of Eviolite and Hard Charm, which effectively do the same thing. Piling 4 of these tools onto a Sigilyph reduces all attack damage by 80, protecting it from everything short of 170 damage. You can also add Umbreon PLF and Team Plasma Badge to give it more HP, allowing it to stay alive even after a Dragon Blast or Black Ballista. Reuniclus can be used to move the damage counters to a Benched Regigigas EX or Kyurem EX PLB, powering them up for serious Outrages. Or, you could use Skyarrow Bridge and Max Potions to switch between Sigilyphs with tools and heal the damage, if you think you'll be able to get in those manual attachments, unless of course you run Emboar or Blastoise. Sableye can be used to recover discarded Tool cards.http://bulbapedia.bulbagarden.net/wiki/Hard_Charm_(XY_119) Those are my ideas. Tell me what you think, and please feel free to leave any of your own ideas in the thread as well.