Weakness Policy Necrozma-DM is a fearsome wallbreaker and mid- to late-game cleaner. Dragon Dance is an excellent tool to boost Necrozma-DM’s damage while also fixing its subpar Speed tier. Sunsteel Strike is a powerful STAB move that threatens most of the tier at +1. Necrozma-DM’s coverage options help break down common Pokemon that resist it, with Earthquake hitting Heatran and opposing Necrozma-DM and Stone Edge hitting Ho-Oh and Corviknight, which otherwise completely wall it. Prism Armor allows Necrozma-DM to shrug off super effective attacks and activate Weakness Policy more easily, putting it in a position to sweep.

Necrozma-DM is best utilized on balance or bulky offense teams as a mid- or late-game cleaner, capable of shredding defensive cores after its checks have been removed. Necrozma-DM's solid defensive stats bolster teammates like Defensive Clefable and Assault Vest Tangrowth immensely, making for some very tough defensive cores. Many Pokemon such as Rillaboom, Victini, and Zeraora appreciate inheriting Necrozma-DM's high Attack stat and its ability to pressure common Pokemon such as Clefable. In turn, these Pokemon threaten the Water- and Steel-types that Necrozma-DM has trouble beating, such as Slowbro, Corviknight, and Skarmory. Necrozma-DM fears fast offensive Pokemon that carry super effective moves such as Rayquaza and Garchomp, whose sheer strength can overwhelm Necrozma-DM. Unaware users like Clefable are useful to ignore setup from these threats, and Pokemon with super effective priority such as Weavile can clean them up after chip.

Necrozma-DM's typing, bulk, and access to reliable recovery make it a great specially defensive wall. Sunsteel Strike lets Necrozma-DM still do respectable damage, and Knock Off is a handy utility move to punish common switch-ins like Ho-Oh and remove damage boosting items from wallbreakers. Toxic cripples defensive Pokemon like Rotom-W and Landorus-T, while Thunder Wave cripples switch-ins like Heatran. Earthquake provides good coverage to hit offensive switch-ins like Heatran, but generally isn’t as useful as spreading status. Morning Sun improves Necrozma-DM’s longevity greatly, but must be used sparingly, for it has very low PP. Leftovers is necessary to provide much needed passive recovery.

Necrozma-DM can form well-rounded defensive cores with Pokemon such as Tangrowth and Buzzwole, who love to receive Necrozma-DM’s Special Defense stat. Both resist Ground, with the latter resisting Dark as well, which helps cover Necrozma-DM's weaknesses. Rotom-W and Necrozma-DM have good defensive synergy, with Rotom-W providing a resistance to Fire, an immunity to Ground, and sporting great bulk with an HP donation, while Necrozma-DM walls Grass-types such as Rillaboom, as it resists their STAB moves. Necrozma-DM is great at spreading status and removing items from switch-ins like Ho-Oh, which helps teammates that struggle with these threats pick up KOs on the weakened foes. Tapu Koko is a great Special Attack receiver to break past various Water-types that are not threatened by Necrozma-DM. Victini is a good choice to receive Attack and counter Steel-types such Skarmory and Corviknight, which wall Necrozma-DM and turn it into setup fodder, while also hitting Water-types with Bolt Strike.

This set combines Necrozma-DM's offensive and defensive utility to create something that can take a hit and hit back hard. Dragon Dance allows Necrozma-DM to become a threatening cleaner versus weakened teams, while Swords Dance is helpful to wallbreak early-game. Sunsteel Strike is an excellent STAB move with great power and good coverage. Knock Off has great neutral coverage with Sunsteel Strike and weakens its checks by removing their items, while Stone Edge hits Flying-types such as Ho-oh and Earthquake hits Steel-types such as Heatran. Morning Sun and Leftovers give Necrozma-DM respectable longevity, but Morning Sun must be rationed so its low PP doesn't run out. Maximum Attack and an Adamant nature maximize damage output while the Speed investment outspeeds base 100 Speed foes after a Dragon Dance.

Pokemon such as Buzzwole and Tangrowth are excellent defensive presences if they receive Necrozma-DM's Special Defense stat, as they resist the Ground moves that threaten Necrozma-DM. Victini loves receiving Necrozma-DM's Attack stat and can threaten many Pokemon that Necrozma-DM can't beat like Ferrothorn and Skarmory. Entry hazard setters like Ferrothorn and Landorus-T help Necrozma-DM wear down its checks faster, with the latter being able to pivot it in with U-turn. This set struggles with Ground-types like Garchomp and Landorus-T, so teammates like Rotom-W, Landorus-T, and Skarmory are recommended. Skarmory and Ho-Oh are especially troublesome Pokemon for Necrozma-DM to face, as both resist Sunsteel Strike and wall sets that lack Stone Edge, so Electric-types like Tapu Koko and Zeraora that can handle these threats for Necrozma-DM, while also keeping up momentum with pivot moves, make great partners. Magnezone is also a valuable partner, as it traps and removes Skarmory and Corviknight.