Teach your Mimikyu Toxic and make sure you have a full team of six Pokémon. Toxic is a move that can be learned by almost any Pokémon for some reason, but we’ll want to teach it to Mimikyu, since its Disguise ability assures that it’ll be able to use it before Ultra Necrozma knocks it out. You can find this TM at Aether Paradise by going to the dock level and traveling all the way to the bottom left of the area, where you’ll see it lying on the ground. The next thing you’ll need is TM06, which teaches Pokémon the move Toxic. Once you have 80, go talk to Samson Oak at Heahea Beach and he’ll give you a Totem Mimkyu. If you are having a hard time finding Stickers, you can refer to our guide by clicking here. To do this, you will need to have collected at least 80 Totem Stickers. The other way to get a Mimikyu is by getting the Totem Mimikyu from Samson Oak. Mimikyu has about a 5% spawn rate, so it may take a little while to find one. One is by wandering around inside the abandoned market that is now the site of Acerola’s Ghost Trial, just south of Tapu Village. If you’re with me so far, you’ll want to go catch a Mimikyu. For this strategy, that one move is all we need. Basically, all this does is ensure that Mimikyu will get at least one move in at the beginning of each battle. After this, the Disguise is “busted” and Mimikyu will take damage regularly. When Mimikyu gets hit with an attack for the first time, the Disguise will take the hit instead and Mimikyu will not take any damage. Mimikyu has a unique ability called Disguise, which basically acts as an automatic Substitute at the beginning of every battle. Many of you can probably figure out where I’m going with this with just that information, but for those of you who aren’t as familiar with specific Pokémon mechanics, allow me to explain.
Simply put, there are two specific things you need for this strategy: Mimikyu and TM06 Toxic. Luckily, I came up with a strategy that is almost guaranteed to help you beat Ultra Necrozma, even if your team isn’t that good. By the way, you can’t catch Necrozma during this battle, so all you can hope to do is defeat it. It’s very possible that you’ll lose to Ultra Necrozma without even getting a single hit in. In short, there’s a good chance that Ultra Necrozma has a high enough Speed to attack first against most of your party, will likely have a move that’s super effective against most of your party members and has a high enough Attack and Special Attack that even if there isn’t a Type advantage, Ultra Necrozma is likely to one-shot most of your team. Between these four attacks, it’s likely that Ultra Necrozma will have a Type advantage against a good amount of your team, and super effective moves are powered up even more by its ability Neuroforce. It also has a very diverse moveset, consisting of Photon Geyser, Smart Strike, Power Gem and Dragon Pulse. Let me explain: Ultra Necrozma has extremely high stats, especially in Attack and Special Attack, and it has an aura that boosts all of its stats even more.
If you haven’t gotten to this point in the game yet, you may be wondering how a battle with just one Pokémon could be so hard. One of the most difficult battles, if not the most difficult battle, in Pokémon Ultra Sun and Ultra Moon is the battle with Ultra Necrozma in Ultra Megalopolis.
On the other hand, if you don’t care about the story too much and just want know how to get past this part of the game, then read on. If you care about experiencing these games’ stories unspoiled, you may not want to continue. Pokémon Ultra Sun and Pokémon Ultra Moon will launch on November 17, 2017, exclusively on the Nintendo 3DS.WARNING: This articles contains major story SPOILERS for Pokémon Ultra Sun and Ultra Moon. Solgaleo and Lunala also get the exclusive Z-Moves Searing Sunraze Smash and Menacing Moonraze Maelstrom respectively. Atk stats, dealing damage to the opponent according to whichever is higher. Photon Geyser - a Psychic-type special move that only Necrozma can learn - “engulfs the target in a pillar of light” and compares the user’s Attack and Sp. This Necrozma form shoots energy that glows darkly from the black parts of its wings. Dawn Wings Necrozma accelerates by shooting black light from its back. This form of Necrozma manifests when the Pokémon takes control of the Legendary Pokémon Lunala, stealing its light energy by force. It slices opponents with its strong claws on its four legs and it can propel itself forward by shooting black light from both sides of its chest. This form of Necrozma manifests when the Pokémon takes control of both the body and mind of the Legendary Pokémon Solgaleo, absorbing the light energy that pours out of it. Pokemon Ultra Sun and Moon's Necrozma will become Dusk Mane Necrozma (left) or Dawn Wings Necrozma (right).