Miraidon ex Expanded (September 2023)

Overview
Current list for Miraidon ex in the Expanded Format. This deck is an underrated powerhouse that seems like it has bad matchups but is more than capable of holding its own weight. The video link here is not this exact list, but it gives you a general idea of how the deck functions.

How to Play
Important to note, as with all decks in Expanded, don't follow such a linear gameplan. What I mean is that I will explain how to play the deck in general, but it is best to adapt to the game situations

Overview
Current list for Miraidon ex in the Expanded Format. This deck is an underrated powerhouse that seems like it has bad matchups but is more than capable of holding its own weight. The video link here is not this exact list, but it gives you a general idea of how the deck functions.

How to Play
Important to note, as with all decks in Expanded, don't follow such a linear gameplan. What I mean is that I will explain how to play the deck in general, but it is best to adapt to the game situations as you see fit, rather than folowing what I saw here every time since it will lead to very predictable outcomes for your opponent to exploit.

Miraidon ex: The main star of the deck. Miriadon-ex is essentially Battle VIP Pass for Lightning mons + Zacian V crammed into one Pokémon. The ability to thin out your deck with Tandem Unit and set up your bench so easily is one of the reasons why this card is popular now. Photon Blaster seems generic, but when you factor in Regieleki VMAX, 1 Retreat Cost, and Electropower, this deck's damage potential goes through the roof. When you think about, Miraidon-ex/Regieleki VMAX is essentially just the ADP/Zacian + Pikarom archetypes crammed together into one deck. More so, this deck also surpasses ADP/Dragonite simply because it does not lean heavily on relying on Raihan and has much higher damage output. Biggest drawback is low HP which means you tend to lose 3 Energy cards vs 2 with ADP/Dragonite, but we will get to this in a second. 

Regieleki VMAX: Plays a secondary support role to Miraidon-ex, but don't underestimate its versatility. Max Thunder and Lightning is an option to attack with if you want a tankier attacker. There's many situations where you're going to want to deal 220 damage minimum anyways, and it makes more logical sense to do so with the bigger HP attacker. Its pre-evolution, Regieleki V, is also great with its Lightning Wall attack if you prefer to "wall" your opponent each turn with it. This can be particularly useful against single prizer decks as you aren't giving up 3 prizes with the VMAX and forces them to find more resources to hit what is essentially "300 HP". Regieleki is also good as a Forest Seal Stone target, hence why it is not necessary to play Lumineon V as this deck needs Tapu Lele for Wobb. 

Flaaffy: The main drawback to this deck is that you're more than likely going to lose Miraidon-ex's which means -3 energy cards. Because you are relying so much on Electric Generators (and they may not always hit) for energy acceleration, if you don't have a way to recover energies or have a consistent way to attach energies, then this deck struggles. Early Miraidon-ex lists chose not to run Flaaffy and opted for Zeraora-GX instead. Yet, people began realizing the importance of consistent energy recovery, even if its just 1 because of the fact Miraidon-ex and to a lesser extent, Regieleki VMAX, needs more energy card attachemnts (3 as opposed to 2 with Dragonite V for instance). Zeraora-GX is not necessary in this deck because when you retreat Miraidon-ex for example, it only costs 1 Energy and you can essentially just re-attach that Energy with Dynamotor. In general, everything in this deck has mostly 1 Retreat Cost, so it doesn't make sense that Zeraora-GX is deemed necessary in here. Plus, GuzHala exists to help you retreat the 2+ Retreat Cost mons like Vikavolt or Flaaffy. Flaaffy makes things a lot easier for you in a deck that is very aggro when setting up, meaning that you discard a lot and by that, discard Lightning Energies. Dynamotor mitigates the loss of Energies in this deck which is necessary for good resource management .

Vikavolt V, Tapu Koko-GX: Vikavolt V is a pretty standard Item Lock card. Helps against things like Meloetta or stalling out a few turns, following by a Super Zap Cannon KO if the situation calls for it. You can flex Vikavolt V with Luxray V if you're struggling with the Control matchup like Wobb Stall for example and prefer a cheaper Retreat Cost. Tapu Koko GX is a great attacking option if your opponent is too reckless with Energies, and the best part is its Ability allows you to move any Lightning Energies in play onto it, followed by moving it into the Active when you bench Tapu Koko-GX Its great because it means that you don't need to worry about committing so many resources to charge up and attack with this Pokémon, you just use whatever you have in play. This card is absolutely necessary for the Shadow Rider matchup especially, but can also be a sneaky way to take down Lugia VSTAR by playing it when after they use Tinachomp's GG End attack. they will have 6 Energies because of 3 Double Dragon Energy attachments, so you can spread your Energies out and take 3 when you Bench.

Finishings:
https://play.limitlesstcg.com/decks/miraidon-regieleki?format=expanded&set=OBF