Avalugg, THE THUGG, is who I built the team around. I'm usually a band enthusiast but Iron Defense is just too good right now, sitting in front of Pokemon like Rillaboom, Urshifu's, Dracovish, Darmanitan-Galar's, even Banded Sawk fails to win which is absurd. This thing checks almost every physical threat in the tier. Avalanche is here to answer CursePult and still take down Specs Nagandel, Specs Dragapult, Specs Latios, Hydreigon, and Landorus-Incarnate!
Regieleki, THE PLUGG, is an amazing partner for a multitude of reasons. Regieleki, although I was initially hesitant of its one dimensionality, does its one dimensionality stupid well, killing water types like Tapu-Fini, Primarina, Suicune, and Volcanion that stomp Avalugg, weird stally Pokemon like Jirachi, Togekiss, Tapu-Koko, Diancie, Spectrier, Arcanine, and Pokemon that might run sets to finesse Avalugg or work around its Sturdy, such as Chople Porygon-Z, Mixed Genesect, and Gardevoir. Thunder Cage is for Custap Primarina and Moltres-Galar, Electro Ball does the most damage to Pokemon such as Registeel and Snorlax, and Hyper Beam is for killing Pokemon that resist Electric such as Haxorus and Nagandel, and even pokemon like Diggersby and Landorus-I that don't bulk accordingly. Oh also the 4 Defense EV's are unironically important for not losing to a life orb or banded Extremespeed Genesect
Volcarona, THE BUGG, was a very cool find for the 3rd Pokemon, courtesy of
Rosa taking a quick glance at a preliminary list. I needed a Pokemon that could handle specially attacking set-up Pokemon that tanked Regieleki and counter Avalugg, the most notable 3 being Raikou, Cresselia, and Sylveon. This set is especially solid vs Sylveon because of Substitute blocking Yawn or Fake Tears. This Volcarona set also handles Wisp-Hex Dragapult, and can finesse Curse variants. Volcarona also handles Magnezone, and Whimsicott for the team. Avalugg+Regieleki is honestly such a solid core, that I could maximize matchups with my EV spread, this spread specifically tanks a 252+ hyper beam from Porygon-Z, along with anything from a Specs Nagandel and Specs Regieleki. The speed is for outspeeding max speed Zeraora and therefore also Dragapult after a Quiver Dance, and the rest in Defense to help live uninvested Phantom Forces from Dragapult, as well as recieve favorable roles vs Life Orb Zeraora Fake Out into Plasma Fists! Maranga Berry is for maximizing random special attacker matchups, one notable one being that this Volcarona can beat Wacan Primarina and pretty much any Primarina lacking Calm Mind!
This team literally has no notable 3-0's. The only ones I could find were Scarf Trick Rotom-Heat, and the unranked Marowak-Alola.
Oh and Spdef Power Up Punch, Defense Curl, Rollout Golurk kinda wins. No Guard is busted because Rollout will never miss!
+6 0 Atk Golurk Rollout vs. +6 252 HP / 252+ Def Avalugg: 760-896 (192.8 - 227.4%) -- guaranteed OHKO (960 base power because defense curl doubles it and then doubling it 6 times, 60-120-240-480-960 kinda busted i know)