Take what I'm about to say with a grain of salt. In actuality, this is more of me asking what the following Pokemon DO to deserve the rank more than anything. An explanation would be perfect for me.
As others have said here, I'm a bit iffy with MM2X being the same rank as MM2Y. IMHO, I don't see how it brings anywhere near as much as MM2Y does.
Granted:
- It has the highest Attack stat in the game,
- great speed
- stupidly strong Low Kick along with
- a high SpA stat to even go mixed
...not to mention that it gets hit neutrally by Dark as opposed to its other Mewtwo brethren. It even has a small (but not necessarily good) benefit of getting to +1 speed if it gets flinched via Fake Out thanks to its ability Steadfast.
However, I feel that's where the good things come to an end.
- With the fighting type, it gains pretty dastardly weaknesses to both Fairy and Flying, two of the most dangerous weaknesses to have with Xerneas, Yveltal, Ho-Oh and (Mega) Rayquaza running rampant in the meta.
- Even with its sky-high Attack stat, it fails to OHKO a lot in the tier due to a relatively poor physical movepool and no real way to boost its Attack outside Bulk Up which is lolbad.
- Psychic type in general is a very meh STAB in this tier, hitting absolutely nothing in this VR for super effective damage (this pretty much goes for all 3 Mewtwo forms tbh).
-Zen Headbutt isn't even that great of a coverage option to begin with because of this. Having the highest attack in the game matters not when it does neutral damage at absolutely best to most of the tier. It can also miss, which sucks shit.
Meanwhile...
MM2Y, despite still being a somewhat suboptimal choice due to having a similar issue with Mega Rayquayquay with opportunity cost regarding the 2 Ubers and 1 mega slots (something MM2X also shares and is worse than this form), has more going for it.
-Probably the highest natural speed stat of any VIABLE Pokemon in VGC 2016. With a vast support move pool (not limited to MM2Y but eh), it can get off what it needs to do faster than anything outside prankster mons. It also has a fast Taunt. #RIP Smeargle
-Being a Special Attacker, unlike MM2X, isn't as affected by Intimidate, burns and Swagger. Mewtwo also has a higher Special move pool than it does physical, with Psystrike, Aura Sphere, Shadow Ball, Thunder, Grass Knot and more all in its arsenal.
-Insomnia is a great ability to have in a metagame where sleep status can be highly detrimental for any given team. Being immune to it is fantastic.
#RIP
SMEARGLE
It isn't without problems though...
-Its lowered defense makes it more prone to priority, whether it's Sucker Punch (especially Dark Aura-boosted ones) from Yveltal, Mega Kanga andMega Mawile or Extremespeed from (Mega) Rayquaza. Primal Groudon's Precipice Blades is also doing more towards it.
-Psychic, again, is a really subpar STAB, but at least Psystrike is way better than lolzenheadbutt.
-Despite it having the highest SpA in the game, Life Orb Mewtwo actually hits harder. Base Mewtwo also has a better Def stat and doesn't take a mega slot.
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Now, I don't really know where to put them because I haven't really got in too far in to the meta just yet, but I strongly don't agree with both of the mega Mewtwos not only being so high in rank but being IN the same rank as each other as well. MM2Y, wherever it ends up, needs to always be higher than MM2X. From what I can gather, X offers nothing in comparison to Y.