difficult

Stand with Exeggutor ex until you get Pidgeot ex, recover with Erika and use DE rocky helmet to make damage. 

1 Prize point deck which aims to counter EX that rack up energies like Celebi and Gyra EX. Deck is still able to take down Charizard and Mewtwo EXs after they discard 2 energies with the help of chip damage of Druddigon and Greninja. It can be inconsistent as you may not get to needed stage 1 or stage 2 pokemon in time, but is really fun to punish those big energy EX pokemon.

Fully Dragon type deck. No type weaknesses.
This is a late game deck that focuses on defending with Druddigon while building up to Dragonite to sweep in late game.

Get Lucky

The core combo of this deck is having a Mewtwo EX as the active Pokemon with two energies while having a Gardevoir on your bench. This will allow you to put two energies on Mewtwo every turn, letting you play Psydrive every turn. Once this combo activates, there aren't many decks that can tank that much reliable damage.

Idk with this one man, I kinda was just really excited to use Victreebel when I finally got one so I threw some bs together. Had Vileplume in it originally but was taking too long to charge it up so I dropped it + a Sabrina (Victreebel can do some of the lifting there) in favor of Venomoth and Shiinotic

At a high level:

(Title is from a phase I had where all my decks were named after pokémon crime syndicates)

The basic concept of this deck is: Marowak Ex but without the Ex part (and more damage)

Generally I don't like having Ex cards in my lists because of the huge value lost if they die, unless they sufficiently make up for that in another way as an engine or control source (e.g. Wigglytuff Ex, Moltres Ex)