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Bulk is the name of the game when playing with this deck, with disruption in the form of Porygon-Z being useful, especially in circumstances where you need to mitigate damage like against Darkrai EX.  With Hard Coat and Guarded Grill on Melmetal and Bastiodon, respectively, they can eliminate a lot of damage very quickly, allowing for potential mid to late game setup and insane comebacks.  

Consistent non-ex aggro deck

Darkrai ex and Magnezone has positive matchups against most top decks, including Palkia ex decks, and other Darkrai ex decks.

Druddigon is the best early-game stall Pokemon, which is perfect for Darkrai ex and Magnezone which are rewarding payoffs for the late-game. Druddigon's Rough Skin + an Energy attachment to Darkrai ex will result in 40 damage per turn, all while Magneton charges in the Bench with Volt Charge.

The deck uses Space-Time Smackdown Magnemite over Genetic Apex Magnemite because of its Attack's Colorless Attack Cost, which it can use for Darkness Energy.

Even though the end goal of the deck is to get to Venusaur, you'll often find that Exeggutor can handle well on its own. The Exeggutors serve as a 1 energy tank that can deal damage while you build the Venusaur in the back. Generally, you would want Exeggutor to take you to the late gate which is when Venusaur serves as clean up with its high HP and sustain. This deck generally only allows room for 2 Pokemon to be fainted so you have to be careful with the Basic and Stage 1 Pokemon.

Ideally you'd start with Hitmonlee, Diglett, and Dugtrio. If you're first energy is psychic play Diglett and hope the next one is fighting, otherwise play hitmonlee and start hitting the back line. Once you evolve Diglett, it and Hitmonlee should be able to give enough time to power up Mew ex. Dual energy is inconsistent but since each fighting mon only uses 1 energy it's tolerable. I tried only fighting energy but I found it better for mew to be able to do 20 damage. Especially if its the first mon you draw.

Steel energy only!

Saw this deck concept, tried it and it worked, so I thought I might post it here...

The idea is to get Dialga in the Active spot as soon as possible and start giving away energy to Arceus and Mew on the bench. Mew is there to try to deal with opposing Charizard and other heavy hitters.

We have only 6 basic pokémon cards here with ways to get the bench full for Arceus.

It's simple: while using Zapdos Ex, which has the potential to deal up to 200 damage with just three Energy, you evolve Froakie to get Greninja. It's a pretty fun combo that, along with the red card and the hand scope, can be quite annoying for your opponent. IMPORTANT: You should only use Lightning Energy since Froakie's first two stages don’t require Water Energy, and for Greninja, you only use his ability. This way, you can deal damage to the benched Pokémon with Greninja while using Zapdos Ex to damage the active Pokémon.

This deck relies on pivoting appropriately. Most of your damage is caused either Darkrai, Poison, or Duddigon. 

The key to this deck is playing into your opponents tempo
 

Start may vary depending on luck of cards initially drawn.

Ideal Start:

The concept is very simple: Seaking is basically Kangaskhan on steroids. 100 HP, 80 damage for one energy, gated behind a coinflip.

Moltres gives you EX kill potential down the line for a single fire energy investment 

Heliolisk gives you guaranteed damage with the potential to match Seaking without needing lightning energy

Hypno buys you time to set up the correct play

Sabrina gives you target flexibility, Pokédex for deck visibility when drawing, Giovanni if extra damage needed 

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