Why dude? With 167 Special and Physical and 129 speed, I don't think it's going to be so low. Ok, maybe it's defences are weak, but it's not like there are many things to revenge-kill it. UN may be one point shy of Mega-Gengar's speed, but the stats only come in the turn after it mega-evolves, while the transformation from DM or DW comes in the turn you transform. Even unboosted, Mega Gengar will easily be OHKO'ed by a Neuroforce and Stab boosted Photon Geyser.
Good point. I did change my mind and I do think Ultra Necrozma could be in A-, A, A+, or even S. One of those tiers is fine by me. I had to check this thing over. Good point! A Timid Mega Gengar automatically out speeds Ultra Necrozma ( Unless Mega Gengar swaps in and Ultra Necrozma uses something to boost it's speed ) and could KO it with a super effective Shadow Ball. Good observation though! I do think I am foolish for saying it would be in B+ tier, I mean it has some insane stats and a nice move pool! Though it could end up in B+ tier or lower if it is not used much.
Ultra Necrozma will not be like insanely broken as the infamous Mega Rayquaza, despite its stats are just bonkers. Despite Necrozma is quite fast and can pull out a better mixed attack style because of Photon Geyzer or just make it hard to guess, Mega Ray has 180, a tad 13 higher than both of its attacks on both sides, Mega Ray is slightly tougher in raw bulk (97/97/97 vs 105/100/100, not a huge difference but still there) and has the stupid Delta Stream which essentially is an "I win" button against something that doesn't also have stupidly powerful attacks to deal with it, while Necrozma has an in-built Expert Belt which is kinda niche despite its massive attack, and has 6 weakness which it can't deal with comfortably unless you use Dusk Mane as a sort of buffer because of its better bulk. It is also limited to its own Z-crystal (although it gives it an incredibly powerful nuke which is gonna hurt quite much), while Mega Ray can carry literally anything (except Z-crystals, but that's like not usable instead of incapable), and even Life Orb to push through everything. As the icing on the cake, Ray has extreme speed of which we all know how crazy it is combined with that 180 base attack while Necro doesn't have any equivalent moves to use.
I hear people saying it should be in AG. It has a potential to be in S tier I imagine in Ubers. But not in AG.
I really dislike how people are criticizing Ultra Necrozma and saying it has no potential to be a very strong Pokemon. Ultra Necrozma may have six weaknesses and it loses to Mega Gengar most of the time it seems like, but I feel like it's strengths easily outweigh it's weaknesses. Ultra Necrozma hits like a tank! It deserves to be in S tier in Ubers!
By the way, Ultra Necrozma can learn amazing moves like Rock Polish, Swords Dance, and Calm Mind!
I did a few calculations with this Pokemon and here are my results.
Please tell me if I am inaccurate with my calculations. I am really sorry if I messed up.
( Had to use an Expert Belt for it's ability and a custom Necrozma to make Ultra Necrozma)
252 Atk Ultra Necrozma Outrage vs. 252 HP / 252+ Def Giratina: 362-427 (71.8 - 84.7%) -- guaranteed 2HKO after Leftovers recovery
+2 252 Atk Ultra Necrozma Earthquake vs. 252 HP / 252+ Def Toxapex: 338-398 (111.1 - 130.9%) -- guaranteed OHKO
252 SpA Ultra Necrozma Heat Wave vs. 252 HP / 252+ SpD Celesteela: 216-254 (54.2 - 63.8%) -- guaranteed 2HKO after Leftovers recovery
+1 252 SpA Ultra Necrozma Power Gem vs. 252 HP / 252+ SpD Yveltal: 276-326 (60.5 - 71.4%) -- guaranteed 2HKO after Leftovers recovery
+2 252+ Atk Ultra Necrozma Earthquake vs. 252 HP / 252+ Def Groudon-Primal: 355-420 (87.8 - 103.9%) -- 25% chance to OHKO
+2 252+ Atk Ultra Necrozma Sunsteel Strike vs. +1 252 HP / 4 Def Xerneas: 482-569 (105.7 - 124.7%) -- guaranteed OHKO
+2 252+ Atk Ultra Necrozma Earthquake vs. 252 HP / 252+ Def Dialga: 439-518 (108.6 - 128.2%) -- guaranteed OHKO
+2 252 Atk Ultra Necrozma Outrage vs. 0 HP / 0 Def Arceus-Ground: 405-477 (106.2 - 125.1%) -- guaranteed OHKO
252 Atk Ultra Necrozma Outrage vs. 252 HP / 0 Def Salamence-Mega: 454-535 (115.2 - 135.7%) -- guaranteed OHKO
+2 252 Atk Ultra Necrozma Outrage vs. 252 HP / 252+ Def Zygarde-Complete: 713-842 (112.1 - 132.3%) -- guaranteed OHKO
+1 252 SpA Ultra Necrozma Moongeist Beam vs. 0 HP / 4 SpD Shadow Shield Lunala: 446-526 (107.4 - 126.7%) -- guaranteed OHKO
+1 252+ SpA Ultra Necrozma Power Gem vs. 252 HP / 252+ SpD Ho-Oh: 442-523 (106.2 - 125.7%) -- guaranteed OHKO
252 Atk Ultra Necrozma Stone Edge vs. 252 HP / 4 Def Yveltal on a critical hit: 494-583 (108.3 - 127.8%) -- guaranteed OHKO
And do not get me even started on what Light That Burns The Sky can do to many other pokemon in the Uber tier. These were just some examples. I know some of these require set - ups, and it's defenses are below average, but if the opponent swaps, it could use something like Swords Dance! All though I disagree with Ultra Necrozma going into Anything Goes.
I am fine with A-, A, A+, or S tier in Ubers for Ultra Necrozma.
I think Ultra Necrozma deserves a spot in the S tier in Ubers! ( When Ultra Sun and Ultra Moon are developed and ready to make the Uber tier lists). OU will probably be the same.
( EDIT: S tier may be an overreaction but any rank in Ubers at B tier through S rank is fine by me. ( B, B+, A-, A, A+, S )