Question

Which is better, Dusk Mane or Dawn Wings Necrozma?

Comments

What do you want to do with Necrozma?

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I can't make much sense of your phrasing. Are you asking if Necrozma is better to be used in sun or moon?

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Edited the title. @11888cake if this isn't what you are asking, then feel free to change it back.

Answer 1

Dusk Mane Necrozma is better than Dawn wings Necrozma in most cases.

Dusk Mane Necrozma
Pros:
1. Good typing defensively
2. STAB combintion is mostly unresisted in Ubers and can be covered up with EQ to round out almost perfect coverage(barring skarmory and celesteela)
3. Good boosting moves in Swords dance and Rock polish/Autotomize, thus can easily sweep with Z move or weakness policy sets. (Very good wall breaker becuz of setup options and steel typing)
4. Can even go defensive and reliably run stealth rocks.
5. Is better as a transformation to Ultra necrozma.
6. Prism Armor Lets you take many powerful supereffective attacks with proper investment.
7. Checks Xerneas(Probably the best to do so)
8. When Ultra Bursting Turns its Ground and fire weakness to a neutrality and a resistance respectively.
Cons:
1. Weak to common attacking types in Ubers like P-groudon's STAB s and Yveltal's Dark attacks and prevalence of mega gengar (becoming trapped and being slower than it even after ultra burst.)
2. Scarf Yveltal and Ho-oh destroy most sets other than stone edge variants, though scarf yveltal doesn't always KO it and is threatened by Searing sunraze smash and hooh loses straight to stone edge.

Dawn Wings Necrozma
Pros:
1. Ghost STAB is mostly unresisted in Ubers and can spam Moongeist Beam(Or use Its Z version to most of the time cause huge damage).
2. Other than Yveltal or any dark type in general it's STABs are amazing and can cover Yveltal with Power Gem.
3. Even though its weak to mega gengar, it is not trapped by Shadow tag due to ghost typing.
Cons.
1. Yveltal's popularity in Ubers means it's mostly a liability.
2. With dark and ghost being 4X weaknesses, Prism armor doesn't mean much and dies to most(if not all) dark and ghost attacks.
3. Other than power gem for yveltal it cannot really hurt dark types in general.
4. Strictly worse than Lunala.(lunala has a better ability, can effectively run scarf, has moonblast and focus blast for dark types and ice beam for Zygarde complete)
5. Only good power boosting move is calm mind which is not very significant(Lunala does that better) and if you want to run sd, may as well run Dusk mane.
6. Is easily pursuit trapped by Marshadow(sometimes, mainly in draft league formats) and Tyranitar.(and dies to both most of the time)

And even keeping Ubers out of the picture..... Dusk mane has a better typing and is useful in most cases..... whereas Dawn wings is held back by its 4X weaknesses and you may as well use Lunala at that point.

Answer 2

In the Ubers tier, dusk mane necrozma is more viable than dawn wings necrozma. It is a great counter to xerneas which is one of the strongest Pokemon in the tier. It can also be a stealth rock lead. It can learn swords dance and rock polish and sweep teams.

Comments

so what use is dawn wings?

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to be honest, not much other than ultra necrozma but still, dusk mane does that better because of swords dance being a better boost than calm mind. It's pretty unviable in the ubers tier being outclassed by lunala.

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Ubers isn't the only competitive format, though. Someone might someday battle you and demand that you don't use dusk mane.
Also you might need it someday if you want to test an extremely obscure game mechanic that may or may not involve ghost types or prism armor. Almost every Pokemon gets used to test game mechanics one way or another.

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I realize that ubers isn't the only competitive tier, but I think it's safe to assume by the title of the question, that he/she wants to know which one is more viable in a competitive battle.

Answer 3

In my opinion, Dusk Mane Necrozma is better than Dawn Wings Necrozma because when Necrozma learns Sunsteel Strike, it can guranteed 2HKO Uber Geomancy Xerneas. It is immune to Poison type attack like if anyone tried to use Toxic or any Poison Type moves on it. Its ability Prism Amor make it better as well because it takes 3/4 from super effective attacks. It resists to Psychic, Dragon, Fairy, Flying, Grass, Ice, Normal, Rock and Steel Type Users. But it is weak to Dark, Fire Ghost and Ground Type Users. It can KO anything with its Signature move Photon Geyser and having it learn Swords Dance make it stupid strong and broken as well. Photon Geyser becomes a physical attack if the user's Attack is greater than its Special Attack, including stat stage changes. This move and its effects ignore the Abilities of other Pokemon. Earthquake is just for a STAB purpose if it meets any Steel Type user or Dusk Mane Necrozma. It should be holding the Ultranecrozium-Z for it to undergo Ultra Burst to transform into Ultra Necrozma. It is stupid fast when it is in that form too. But it will be weak to Bug, Dark, Dragon, Fairy, Ghost and Ice Type Users. It resists Electric, Fighting, Fire, Grass, Psychic and Water Type Users. Its ability Neuroforce make it more OP and broken because Ultra Necrozma's attacks that are super effective against the target will do 1.25x damage. Its strongest Z-Move Light That Burns The Sky can gurantee to KO anything that stand in its way. It is a very powerful Z-Move. Light That Burns The Sky becomes a physical attack if the user's Attack is greater than its Special Attack, including stat stage changes. This move and its effects ignore the Abilities of other Pokemon. This is why Dusk Mane Necrozma is better in my opinion.