The concept is to strongly utilize a versatile combination of Hippowdon + Aegislash, gaining an advantage against setup-oriented builds, and finishing at 36th place (R2510). Judging that there were many setup-accumulating builds like Hydreigon-Garchomp-Ninetales, Hippowdon-Blissey, and Baton Pass teams, I adopted many elements strong against them. Mega Greninja + Hippowdon can gain an advantage against Ninetales-Garchomp and Blissey-Braviary, so I started the build with these two. The basic flow is to gain a numerical advantage with the lead, then push through with Yawn Hippowdon and Mimikyu. To also defeat type-complementary offensive builds like Hydreigon + Aegislash and Delphox + Samurott, I formed a cycle with an HD-based Aegislash and adopted a Scarf Meowscarada for flexible leads. Originally, I used Mega Staraptor, but it clearly held the team back, so I switched to Mega Dragonite. The author added that in a diverse environment, they do not heavily consider specific opponents that distort leads, such as stall teams or Vivillon, and find it more rational to build a team that is slightly advantageous against common compositions in the environment.
Mega Greninja (Protean, Timid, EVs: HP 16, Sp. Atk 28, Sp. Def 1, Speed 21 / Ice Beam, Sludge Wave, Dark Pulse, Rock Tomb): H-D endures 97.8% from Specs Duraludon's Draco Meteor, A is 99%+ against HP-invested Charizard Y, S outspeeds max speed Mega Gengar. Its role is to exploit weaknesses and wear down environmental setup types, then confront setup attackers. Rock Tomb opens up responses for Mimikyu and Meowscarada in the back, and if Mega Gyarados enters Meowscarada's Triple Axel range, it prevents speed boosts and doesn't give a setup opportunity.
Hipowdon (Sitrus Berry, Sand Stream, Relaxed, EVs: HP 32, Defense 22, Sp. Def 12 / Earthquake, Yawn, Stealth Rock, Slack Off): H-B is 11n, ensuring it takes a Swords Dance Porygon2's Return. S is lowered to account for mirrors. It serves as both a setup (Hippowdon + Mimikyu) and a physical wall (Hippowdon + Aegislash) axis, and by setting up sand, it also has the effect of artificially increasing Aegislash's firepower through cycling.
Mimikyu (Life Orb, Disguise, Adamant, EVs: HP 1, Attack 32, Defense 1, Speed 32 / Play Rough, Shadow Sneak, Curse, Swords Dance): Max AS investment. Minimum performance is guaranteed by Play Rough + Shadow Sneak + Swords Dance. Curse is adopted to resist Clefable and various Baton Pass builds, also serving to finish off the last Pokémon with guaranteed damage from Curse.
Aegislash (Leftovers, Stance Change, Sassy, EVs: HP 32, Attack 7, Defense 6, Sp. Atk 1, Sp. Def 20 / King's Shield, Shadow Ball, Flash Cannon, Sacred Sword): H-D is thick to account for special attackers from Mega Evolutions. It is strong against Metagross and can also confront Dark types like Greninja and Hydreigon that often accompany it. It performs a wide range of cycles, exchanges, and breakdowns with Hippowdon, but due to the removal of Iron Head, it is weak to fairies like Florges and Primarina, which is compensated by Meowscarada's Toxic Spikes.
Meowscarada (Choice Scarf, Protean, Jolly, EVs: HP 2, Attack 32, Speed 32 / Triple Axel, Knock Off, Toxic Spikes, U-turn): Max speed for mirror matches. It is strong against Water types like rain teams and Gyarados, making its adoption highly valuable. Knock Off helps Aegislash deal with Leftovers users like Umbreon and Toxapex.
Dragonite (Multiscale, Modest, EVs: HP 25, Defense 1, Sp. Atk 12, Sp. Def 1, Speed 29 / Draco Meteor, Air Slash, Flamethrower, Roost): H 16n-1, C 11n, S outspeeds modest Mimikyu. Its lead rate is low due to the high usage of unfavorable matchups like Metagross and Mimikyu, but it is good for bringing in against Scizor, which is somewhat difficult for the core.
Basic leads are Greninja + Hippowdon + Mimikyu, or Meowscarada + Hippowdon + Aegislash. Beyond these, combinations are made flexibly according to the opponent.
Glimmora, Pyroar, Mawile, Umbreon + Toxapex combination, max speed Scarf Meowscarada mirror match.