Moves
Nasty Plot doubles Mismagius's Special Attack, allowing its attacks to sting that much harder. Shadow Ball is Mismagius's primary attacking move, hitting a large majority of the tier for at least neutral damage. Thunderbolt makes for a great coverage option, smacking Mandibuzz and Milotic hard, and it also has enough power to OHKO Mega Blastoise and even the most specially defensive Mantine variants after a Nasty Plot boost. It is notable that +2 Thunderbolt followed by +0 Thunderbolt is capable of 2HKOing physically defensive Milotic, meaning Milotic's Haze won't save it. Taunt shuts down recovery and status moves, giving Mismagius an easier time breaking defensive teams and turning mono-attacking Pokemon such as Registeel and RestTalk Snorlax into complete setup fodder. It also stops Stealth Rock and Defog, which can sometimes come in handy for entry hazard control when combined with Mismagius's spinblocking capability. Substitute is another way to take advantage of Pokemon that are reliant on status or have ineffective attacks, exchanging the ability to prevent the use of non-attacking moves for a safety buffer against revenge killing or Pursuit attempts, as well as heavily punishing Pokemon Choice-locked into attacks that Mismagius is immune to.
Set Details
Full Speed investment alongside a Timid nature lets Mismagius outspeed as many threats as possible, such as Yanmega, Adamant Zygarde-10%, Shaymin, and Ninetales, as well as Speed tie with opposing Mismagius. 8 Defense EVs allow Mismagius to never get OHKOed by Adamant Donphan's Knock Off. The remaining EVs go into Special Attack to maximize Mismagius's damage output. Ghostium Z grants Mismagius access to Never-Ending Nightmare, providing an immediate source of raw STAB damage. At +2, Never-Ending Nightmare has enough power to OHKO Goodra and bulky Escavalier (though Protect must be scouted), while an unboosted Never-Ending Nightmare can OHKO the likes of Cresselia, Bronzong, Roserade, and bulky Arcanine after Stealth Rock damage roughly half of the time, as well as secure the OHKO on Ninetales after Stealth Rock damage. Electrium Z is another alternative, as it allows Mismagius the potential to OHKO Mega Blastoise, as well as set up directly in front of Milotic and specially defensive Mandibuzz to then OHKO them with +2 Gigavolt Havoc. It also allows Mismagius to OHKO Drapion and Bewear at +2. Both item options weaken Knock Off as a bonus, though keep in mind that neither will save Mismagius from the stronger Knock Offs coming from Drapion, Sneasel, and Pangoro. Colbur Berry is a fine alternative item choice should the team's Z-Crystal slot be used up. Colbur Berry allows Mismagius to either switch into Mega Blastoise's Dark Pulse and do a chunk with Thunderbolt, making it easier to revenge kill and thus preventing it from using Rapid Spin, or win against Mega Blastoise one-on-one. It also enables Mismagius to better withstand Mandibuzz's Foul Play and helps reduce the threat of Pursuit.
Usage Tips
Mismagius's best chance to set up Nasty Plot usually comes in the form of walls that it can scare out or Pokemon that cannot threaten it as it sets up, such as Bronzong, Cresselia, Registeel, Mantine, and RestTalk Snorlax. Mismagius can use either Taunt or Substitute to neutralize most of the aforementioned Pokemon to begin breaking through the opponent's defensive backbone. Mismagius is also one of the few offensive Pokemon that can set up on Nidoqueen. Because Mismagius's longevity can be lacking, it would be unwise to hold on to its Z-Move for longer than necessary, and using it at the right moment can be crucial in softening up a threat or forcing a switch while racking up entry hazard damage. While Mismagius doesn't have too much to fear from most Pursuit users due to the threat of its +2 Z-Move, it would be ideal to remove them before Mismagius sets up so that Mismagius doesn't have to use its Z-Move prematurely.
Team Options
Mismagius is a great fit on offensive hazard stacking teams where its aforementioned qualities of preserving entry hazards can be a useful asset and it can keep up the pressure with Nasty Plot as well as disrupt the opposition with Taunt or Substitute. Powerful entry hazard setters such as Roserade, Rhyperior, Nidoqueen, Metagross, Golisopod, Mega Glalie, and Araquanid are appealing teammates, as they can help maintain offensive momentum. Mismagius appreciates having teammates that can dispose of bulky Pokemon that withstand Ghost-type attacks such as non-RestTalk Snorlax, Porygon2, Mandibuzz, and Umbreon. Fighting-types such as Bewear, Virizion, and Toxicroak make terrific teammates, as they can put major pressure on bulky Normal-types as well as Mandibuzz and they especially appreciate any entry hazards on the field to make punching holes into the opponent's team easier on them. Mismagius is also vulnerable to most faster attackers such as Zygarde-10%, Noivern, and Choice Scarf users like Tyrantrum and Gardevoir, though it should be noted that faster special attackers can't revenge kill a healthy Mismagius and may be susceptible to a boosted attack. Setup sweepers and late-game cleaners, such as Barbaracle, Virizion, Speed Boost Yanmega, Zygarde-10%, Choice Scarf Gardevoir, and Z-Celebrate Shaymin, greatly appreciate Mismagius breaking the opponent's cores, with some of them even potentially taking advantage of some of the faster attackers that threaten Mismagius.