Of course, there was no way known I wouldn't be expressing my views on this!
Porygon2,
S to A+
Don't get me wrong, P2 is still one of Battle Spot's most influential Pokemon and prevalent defensive threats. However, I do feel that this generation so far, Porygon2 has been struggling to be the unbreakable mon which it wants to be. We're seeing higher levels of usage in Pokemon that can break Porygon2 including Choice Specs Tapu Lele, Choice Band Tapu Bulu, Pheromosa, and Mamoswine.
Furthermore, Porygon2 is being forced to chose what it gets walled by. Without Discharge / Thunderbolt Porygon2 can't beat Celesteela or Mega-Gyarados, without Ice Beam it can't beat mega-Salamence, without Shadow Ball it can't beat Substitute Aegislash. Porygon2 obviously still remains as an amazing Pokemon, but it seems to need a lot more support than it once used to, which is why I believe it should sit at
A+ rather than
S.
Mega-Gengar,
A to A+
Can't say I'm entirely sure as to why Mega-Gengar isn't in the A+ bracket. Base 130 speed is already fantastic, putting it on par with Tapu Koko, but the main highlight here for me would have to be the 170 special attack. Ghost / Poison as an offensive typing is fantastic, giving it powerful STAB options (primarily being Sludge Bomb / Shadow Ball) which comfortably deal with opposing Psychic and Ghost threats including Aegislash / Alolan-Marowak / Mega-Metagross / Tapu Lele, and Fairy threats including all of the Tapus / Mimikyu / Azumarill / Alolan-Ninetails.
Sheer offensive pressure isn't all that Mega-Gengar can do either. A Substitute / Will-O-Wisp / Hex / Destiny Bond is a set I've seen a lot more of recently, putting immense pressure on some of the physical powerhouses we've seen so far to avoid getting burnt. I see why A rank would be suitable because of lack of bulk and competition with other Pokemon for the mega slot, but I do believe that it has capacity to be elevated from
A to A+.
Mega-Metagross,
A- to A
Really don't have all that much to say about this one, personally I think it's been ranked fairly harsh. It's truly a terrifying Pokemon to face, offering both amazing offensive and defensive presence. Sufficient coverage, difficult to break, hits extremely hard.
A- to A for me on this one.
Porygon-Z, ranked at
B+
Although quite an unorthodox and fairly rare Pokemon in the current metagame, Porygon-Z most definitely deserves some sort of ranking given its niche of Z-Conversion. Seeing a Porygon-Z in your opponent's team preview makes you have to account for the situation of whether it's going to convert to Ghost / Dark / Electric, which can be an extremely tough to do with only 3 Pokemon to bring.
In addition to this, Porygon-Z is a fantastic win condition and is extremely difficult to stop once it has set up. +1 in all stats gives it plenty of bulk to survive priority moves, even if super effective. Most notable however would be the speed and special attack boost, ticking all the boxes which make it a setup sweeper. Adaptability and Z-Conversion work hand in hand with each other, giving Porygon-Z x2 STAB on the move it converts to. Underrated Pokemon for sure, most definitely deserves a
B+ at the very least for me!