[OVERVIEW] Rock ======== Mega Diancie stands out as the best Mega Evolution and mixed attacker for Rock teams thanks to its fantastic Attack and Special Attack stats and great movepool. These traits are accompanied by an impressive 110 Speed stat, allowing Mega Diancie to outspeed threats such as Keldeo and Terrakion. Mega Diancie takes great advantage of its Attack stat with Diamond Storm, a powerful and reliable Rock-type STAB move with a 50% chance to increase its Defense by 2 stages. This can be very helpful against threatening physical attackers like Breloom and defensive Mega Scizor, since it survives an unboosted Bullet Punch when at +2 Defense. With Magic Bounce, Mega Diancie provides fantastic utility, bouncing back entry hazards such as Galvantula's Sticky Web as well as status moves like Thunder Wave and Will-O-Wisp. Its part-Fairy typing along with a strong Fairy-type STAB move in Moonblast allows it to beat threats to Rock teams such as Mega Sableye. Its great movepool also allows it to provide a plethora of helpful coverage. Unfortunately, Mega Diancie's terrible bulk and defensive typing make it largely vulnerable to common priority moves such as Aqua Jet and Bullet Punch. Even with Mega Diancie's fantastic Speed, it's still susceptible to revenge killers like Excadrill in sand, Tapu Koko, and Choice Scarf Jirachi. Mega Diancie also has difficulty fitting all of its beneficial coverage options onto a single set. [SET] name: Mixed Attacker (Rock) move 1: Diamond Storm move 2: Moonblast move 3: Psychic move 4: Hidden Power Fire item: Diancite ability: Clear Body nature: Naive evs: 16 HP / 240 SpA / 252 Spe [SET COMMENTS] Moves ======== Diamond Storm is Mega Diancie's best Rock-type STAB move, being able to increase its Defense by 2 while also allowing it to beat specially defensive Pokemon like Zapdos and Mantine. This allows Mega Diancie to function as a mixed wallbreaker rather than a primarily special one. Moonblast is used to hit Fighting-, Dragon-, and Dark-types like Keldeo, Garchomp, and Mega Sableye. Psychic is a solid option alongside Diamond Storm, allowing Mega Diancie to effectively dismantle Poison's defensive core of Mega Venusaur, Toxapex, and Alolan Muk, specifically being able to 2HKO Mega Venusaur, which typically poses a threat to Rock teams. Hidden Power Fire allows Mega Diancie to hit Steel-types such as Skarmory and Ferrothorn, as well as hitting Mega Scizor on the switch. Earth Power is a good alternative, allowing Mega Diancie to KO Steel-types that aren't beaten by Hidden Power Fire, such as Heatran and Magnezone. Set Details ======== Maximum investment in Speed with a Naive nature allows Mega Diancie to outspeed Pokemon such as Landorus and Infernape. A Naive nature is chosen over Hasty because the former will allow Mega Diancie to always survive Mega Lopunny's High Jump Kick from full health. 16 EVs in HP are used to always survive Skarmory's Iron Head before Mega Evolving while 2HKOing it with Hidden Power Fire. However, if Earth Power is opted for, these EVs are unneeded. Before Mega Evolving, Mega Diancie will have the ability Clear Body, which makes it immune to stat decreases, which is especially helpful when coming in on Sticky Web. Upon Mega Evolving, it gains Magic Bounce, which allows it to bounce back status moves such as Toxic and Thunder Wave and entry hazards such as Stealth Rock and Sticky Web. Usage Tips ======== In most situations it's a good idea to lead with Diancie and Mega Evolve against entry hazard setters in order to bounce the hazards back, which is especially helpful against Galvantula's Sticky Web, since Rock teams don't use any hazard removers. If possible, always take the opportunity to revenge kill something with Diamond Storm, since Mega Diancie largely benefits from the +2 Defense increase. Since Mega Diancie's bulk isn't very good, try bringing it in after another Pokemon on your team has fainted. In matchups like Dark and Dragon, try to make smart doubles into Mega Diancie in order to shift more momentum on your side. In matchups like Fighting, Grass, and Poison where you need Mega Diancie to be as healthy as possible, don't let it take unnecessary damage before it encounters an important threat like Breloom or Mega Venusaur. Sometimes it's better to hold off on Mega Evolving to take advantage of regular Diancie's superior bulk to allow it to survive a Hidden Power Steel from Latios, as well as being unaffected by Sticky Web and Intimidate thanks to Clear Body. Avoid switching into powerful neutral or resisted attacks, especially after Mega Evolving. Try switching into passive Pokemon such as Klefki in order to bounce back status conditions and hazards. Team Options ======== Shuckle can set up Sticky Web for Mega Diancie to allow it to outspeed Choice Scarf users such as Terrakion and Heracross while also being able to halt setup sweepers like Mega Scizor and Azumarill with Encore. This frees a moveslot for Mega Diancie, since it won't have to rely on Rock Polish to outspeed most threats. In return, Mega Diancie can bounce back Stealth Rock to make sure Shuckle doesn't lose a quarter of its health upon switching in. Terrakion can break past defensive checks like Chansey and Porygon2 that would beat Mega Diancie otherwise while also being a solid revenge killer with a Choice Scarf, revenge killing threats like Hydreigon and +1 Mega Sharpedo. Tyranitar is a powerful physical wallbreaker that can set up sand for Mega Diancie, which boosts its Special Defense. It's also capable of trapping Latios and Gengar with Pursuit. Rhyperior and Alolan Golem are both capable of checking Mega Scizor for Mega Diancie. Rhyperior can serve as an effective physical blanket check against threats like Excadrill and Landorus-T, while Alolan Golem can trap and remove problematic Steel-types like Celesteela and Ferrothorn. Cradily can come in on Water-type attacks for Mega Diancie while also being able to beat Ground-types like Hippowdon, Seismitoad, and Choice Scarf Landorus-T. In return, Mega Diancie can check Fighting-types like Terrakion and Heracross while also bouncing back threatening status moves like Toxic. Omastar appreciates Mega Diancie keeping entry hazards away in order to be as healthy as possible while setting up with Shell Smash. It can also beat Ground-types like Hippowdon and Mamoswine with its Water-type STAB moves. Nihilego is a good secondary special wallbreaker that can beat Fairy- and Grass-types like Clefable, Tapu Bulu, and Celebi with its Poison-type STAB move. It can also use its helpful coverage to remove Water-types like Swampert and Mega Slowbro with Grass Knot and Thunderbolt respectively, as well as Ground-types like Landorus and Gliscor with Hidden Power Ice. [STRATEGY COMMENTS] Other Options ============= Rock -------- Rock Polish can be used to give Mega Diancie a chance to sweep offensive teams. However, this is usually unnecessary with the speed control offered by Shuckle’s Sticky Web. Calm Mind can be used in order to increase Mega Diancie's wallbreaking potential, always OHKOing Tapu Bulu at +1 with Moonblast. Power Gem can also synergize with this, doing much more significant damage against Mega Venusaur than Diamond Storm would. Outside of this, though, Mega Diancie finds more use from the extra coverage provided by Hidden Power Fire and Psychic, and Diamond Storm is the preferred Rock-type STAB move in order to KO specially defensive Pokemon like Zapdos and Mantine more easily as well as obtain a helpful Defense boost. Hidden Power Ice can be used as a means of KOing Landorus and Gliscor. However, this would come at the cost of Hidden Power Fire, making Mega Diancie unable to 2HKO Skarmory and Ferrothorn. Checks and Counters =================== Rock -------- **Gastrodon**: Gastrodon is one of the most consistent defensive answers to Mega Diancie, not fearing any of its attacks and being able to use Recover to heal any lost damage while wearing Mega Diancie down with Scald and Earthquake. **Defensive Pokemon**: Chansey and Porygon2 are never 2HKOed by any of Mega Diancie's attacks and can use their recovery to wear down Mega Diancie while keeping themselves healthy. However, with Calm Mind, Mega Diancie is able to beat Porygon2. **Steel-types**: Steel-types like Mega Scizor and Choice Scarf Jirachi can beat Mega Diancie with their respective STAB moves. **Water-types**: Water-types like Kingdra, Mega Swampert, and Greninja are able to outspeed and KO Mega Diancie. However, none of these Pokemon will appreciate switching into a Moonblast. **Grass-types**: Grass-types like Choice Scarf Tapu Bulu and Rotom-C can outspeed and KO Mega Diancie with their Grass-type STAB moves. Tapu Bulu KOes even after Mega Diancie has a Defense increase, and Rotom-C is unaffected by Shuckle's Sticky Web. **Ground-types**: Ground-types like Excadrill and Dugtrio can outspeed Mega Diancie and remove it with their STAB attacks. Dugtrio in particular can make sure Mega Diancie is unable to switch out thanks to Arena Trap. **Revenge Killers**: Choice Scarf Keldeo and Tapu Koko are capable of outspeeding and KOing Mega Diancie, despite not being able to come in on a Moonblast.