I guess I'll give this a try. It helps me test something given this laptop has been acting up again all week and I still need to do a write later. Joy....
Weezing-Galar @ Black Sludge
Ability: Neutralizing Gas
EVs: 252 HP / 252 Def / 4 SpD
Bold Nature
IVs: 0 Atk
- Sludge Bomb
- Strange Steam
- Flamethrower
- Pain Split
Submitting Galarian Weezing as a
counter with a slight variation on the typical defensive set that means you aren't as free to Steel types switching in or at least not the ones that don't care about Will-o-wisp as much like (offensive) Celesteela and the currently rare specially offensive Jirachi. Flamethrower also helps it beat Amoonguss as well. Additionally, Flamethrower (or Fire Blast) also seems like a reasonable change as someone who has never quite liked using Defog on this thing anyway even when Levitate is its ability, though it is an okay Defogger--more just personal preference.
Anyway, I'm addressing possible switch-ins to Weezing-Galar first instead of talking about Tapu Bulu itself just because of how hilariously effortlessly defensive Weezing-Galar counters Tapu Bulu without Zen Headbutt or (crit) Stone Edge, forcing it to switch out or explode. Despite Neutralizing Gas not doing anything to Bulu unless you double switch in with Weezing-Galar coming in first, that's ironically for the better since the lack of Levitate means you get to heal from Grassy Terrain too. Being on the ground makes both Darkest Lariat and especially Close Combat essentially free to switch in on barring any hazard damage:
CALCS
252+ Atk Life Orb Tapu Bulu Close Combat vs. 252 HP / 252+ Def Weezing-Galar: 29-35 (8.6 - 10.4%) -- possibly the worst move ever
252+ Atk Life Orb Tapu Bulu Darkest Lariat vs. 252 HP / 252+ Def Weezing-Galar: 42-49 (12.5 - 14.6%) -- possibly the worst move ever
This leaves Horn Leech as the only attacking move that is remotely threatening to defensive Weezing-Galar, and even with Stealth Rock and 3 layers of Spikes
and (nerfed Gen 8) Grassy Terrain up, Horn Leech
still doesn't OHKO you at +2 from full without a crit. Meanwhile, STAB Sludge Bomb effortlessly wastes Tapu Bulu even with no investment. Finally, having Flamethrower is a nice if unnecessary addition even against Tapu Bulu itself since Flamethrower essentially does at least 45% after Life Orb recoil and Grassy Terrain healing if you want to fish for switches since Bulu goes first, preventing it from healing off the damage via Horn Leech that turn; even Strange Steam is a decently damaging option for fishing given this Bulu is so unthreatening to Weezing-Galar, with the random confusion being something else Bulu wants to flee from:
MORE CALCS
+2 252+ Atk Life Orb Tapu Bulu Horn Leech vs. 252 HP / 252+ Def Weezing-Galar in Grassy Terrain: 144-172 (43.1 - 51.4%) -- guaranteed 2HKO after Stealth Rock, 3 layers of Spikes, Black Sludge recovery, and Grassy Terrain recovery
0 SpA Weezing-Galar Sludge Bomb vs. 0 HP / 4 SpD Tapu Bulu: 352-420 (125.2 - 149.4%) -- guaranteed OHKO
0 SpA Weezing-Galar Flamethrower vs. 0 HP / 4 SpD Tapu Bulu: 118-140 (41.9 - 49.8%) -- guaranteed 3HKO after Grassy Terrain recovery
0 SpA Weezing-Galar Strange Steam vs. 0 HP / 4 SpD Tapu Bulu: 88-105 (31.3 - 37.3%) -- 0% chance to 3HKO after Grassy Terrain recovery