Virizion/Genesect/Mewtwo will run rampant. The #1 Counter to Gbooster is Spiritomb.
An you can't damage Spiritomb from the active if Mr Mime is on the bench, it will be even harder to active them both now to.
Red Signal exists. If you run both
Mr. Mime and
Spiritomb, you can't utilize a "seven Prizes" strategy. That also means it is well worth using one
Genesect EX to take care of things; if you aren't attacking with
G Booster you aren't discarding Energy. That means you can be setting up your next attacker. The opposing deck, which dedicated deck space to running
Mr. Mime and
Spiritomb and resources to getting them into play, now has only three Bench slots to work with.
G Booster is an important part of
VirGen but is the deck really helpless without it? Megalo Cannon seems like a solid attack.
G Booster, if it is so vital, creates problems when it is discarded. Sure you can use
Shadow Triad or perhaps some other trick to get it back, but that costs resources. So I am just saying, if blocking
G Booster, which requires running a Bench-sitter that serves little other purpose, is so great, why isn't
Tool Scrapper and just using your normal tactics of this format (OHKO everything) just as effective?
Not to mention going 2nd and starting Spiritomb is a very good play as well because of his attack. I don't see why anybody wouldn't especially if you get him turn 1 or 2.
Ace specs can turn very tight games around quickly, scramble switch, gbooster, computer search, dowsing machine, gold potion.
Spiritomb will need an Energy to attack; in some decks that will be a significant constraint. You have to attack to attack... should be obvious, but if I am not attacking for damage, I am not attacking for damage. You have to have
failed to set up in order for a set-up attack to be useful. For a slower deck, okay this is more likely... but now you have to remember that
Spiritomb isn't a source of guaranteed, good draw. Not everyone owns
Tropical Beach, and not everyone who does own enough copies will run it or even use it first turn when they do run it.
Sometimes, your "very good play" will be... shuffling a five card hand into your deck in order to draw zero cards. Or fewer cards than you had before. Or to shuffle away something you really wanted to keep in hand. Obviously you don't use Hexed Mirror then... but your comments read like there would never be such a circumstance. As for Ace Specs, yes they can be great plays... but as most decks can only use one of them, most decks don't rely on them. You're sinking a decent amount into stopping one card, even if that one card is a good, useful card.
Landorus, Darkrai, Genesect, Kyurem will still all be played. It would be a mistake in deck building to ever NOT considering having at least 1 Mr Mime in your deck.
What if you have other options for dealing with such cards? What if your deck isn't especially vulnerable to Bench damage? What if you need the space (in the deck and/or on the Bench) for something else? You get a 60 card deck, and you get six Pokémon for your side of the field; there are a lot of good cards that have to be cut from a deck.
Especially after the rule change, and because of this exact reason, damaging the active and moving damage counters to a benched Mime will be more prevalent.
Dusknoir will see a lot more play, I can think of 4 decks off the top of my head that will run Dusknoir and have potential to do well in the competitive scene.
Wait a minute; if
Dusknoir is big,
Mr. Mime becomes less important as it will be a dead card that match, unless you want to give up an even easier Prize. As for the rest... I am not God, rileysill32, but neither are you. A lot of decks have the "potential" to do well in the competitive seen, but either never do or only for a short time.
Dusknoir is still Darkness Weak and wouldn't you know it, one of the decks that can still risk
Pokémon Catcher would be
Sableye/
Darkrai EX. One of the decks that can risk a
Genesect EX on the Bench to use Red Signal would be Team Plasma decks, which either already play or can work in
Absol (Plasma).
Garbodor still shuts Abilities down, so that is another potentially problematic match-up. It isn't a "sure thing" even when it is possible.
Genesect will easily be able to take the place of 4 catcher's in ANY energy accelerated deck.
Emboar and Blastoise can surely afford the space to run 1 Genesect an 2-3 plasma energy while they cycle through their energy acceleration with their abilities.
I don't see any problems there.
That's because you're covering your eyes. It isn't just a matter of space, but of what is most efficient. Deluge decks were already running light on
Pokémon Catcher. Those decks don't have room to include other support either; you've got to get
Genesect EX and
Plasma Energy into hand before you can play them.
Garbodor doesn't care if you run
Genesect EX becauase Garbotoxin still shuts of Red Signal.
TL;DR: I don't have the hard data in front of me. I am still working off of speculation. What I do try and do is explain myself as clearly as I can. Even if you get stuck with a "wall of text", if I am vague about something it probably means I accidentally deleted some words. I have presented my arguments and my reasoning behind them. Feel free to disagree. Just know that when you post to contradictory arguments and then fail to marry them into greater whole, I'll call you on it.
"Either/or" is find, as is "and also", but they need to be clearly distinguished so I can tell when which is being used because sometimes the point is "However you approach it, there is a problem", when other times it is "If 'this' is a problem, how can 'that' be a problem when 'this' prevents 'that'?"