Its One of the top Plasma Freeze Card. Whenever a card is printed that increases the damage you can do, it will very often see play.
Uses & Strategies :
Because the aim of the game (mostly) is to take Prizes faster than your opponent and being able to do this in fewer attacks with the help of some damage boosting will go a long way to make sure that happens. Think of Expert Belt, Crobat G, the classic PlusPower, Special Dark Energy, Hypnotoxic Laser .
The main attraction with this card is the Ability. Power Connect adds 10 damage to the attacks of all your Team Plasma Pokémon, and yes it stacks, meaning that you get an extra 10 damage for each Deoxys you have on the Field. This is great for getting your Plasma Pokémon hitting the numbers they need for the OHKO. With three of these Benched, Thundurus-EX’s Raiden Knuckle does 60 damage and can one-shot evolving Basics, and a Lugia-EX or Kyurem can take out a clean EX Pokémon with the help of Hypnotoxic Laser and Virbank City Gym. Even if you can’t manage the one-hit, multiple Deoxys will put any opponent under a lot of pressure by getting heavy damage on the Field early game, making the job of cleaning up later that much easier. It shouldn’t be forgotten that the benefits of Deoxys can also be applied to any non-Plasma Pokémon if they have Plasma Badge attached, and this will lead to the creation of some new and interesting decks. Imagine a Darkrai-EX with boosted Night Spear, or Landorus-EX and Cobalion-EX having their cheap but low damage attacks being turned into something much more threatening.
Strengths/Pros & Weaknesses/Cons:
Deoxys-EX is a Team Plasma EX of the Psychic Type. The 170 HP may be 10 short of the maximum, but is certainly nothing to complain about. The Weakness to Psychic probably has players thinking about Mewtwo-EX, but Mewtwo usage is on the decline for the moment, Deoxys will often not have Energy attached, and the Weakness cuts both ways. The only thing to really dislike about the card is the awkward Retreat cost of two. It’s not something you will really want to pay with Energy, so decks which run Deoxys really need to think about including some switching Trainers.
Artwork and aesthetics:
The artwork is really cool. I'm Sure you'll be ending up making this card as your trump.
Speaking of attacks, Deoxys-EX does have one and it’s . . . not bad. That’s surprising really as they usually attempt to balance cards that are powerful on the Bench by giving them poor attacks (see also Garbodor DRX, Eelektrik NVI). The one big downside is that Deoxys cannot boost its own damage, or the damage done by other Deoxys (as stated in the text for Power Connect). Nevertheless, in the right circumstances it can be effective. Helix Force costs one Psychic and one Colourless Energy and does a base damage of 30. However, if it has Plasma Energy attached, it will do another 30 for each Energy attached to the Defending Pokémon. This can make it an effective attack against something like a Keldeo-EX which has a stack of Energy on it, and it’s also pretty good against Mewtwo-EX, which will fall to a OHKO if they have two or more Energy attached. It’s not the best weapon in Plasma’s armoury, but it’s better than you think and can certainly be used to take some Prizes if necessary.
Deoxys-EX feels like a card that the designers have tried to balance by making it a 2-Prize EX Bench-sitter with an Ability that doesn’t even work on its own attack. While this may have prevented the card from being outrageously broken, it still leaves us with an extremely powerful support Pokémon for a new top tier deck type. The EX status even helps in some ways as 170 HP means that any opponent is going to have to devote a decent amount of resources to KOing it while ignoring the threat posed by any main attacker . . . and of course there’s a high chance that any knocked out Deoxys will be easily replaced by another.
Be prepared to be sitting opposite a row of these during the upcoming tournaments, being forced to make some mental calculations and coming up with answers which you won’t much like.
Overall rating: x.x/5.0
Modified: 4.5 (one of the best support cards for aggressive decks that Pokémon have printed)
Limited: 4.5 (bulky, and has plenty of Plasma Pokémon in the set to work with)