Bulk Up Life Orb for [Gen 8] Anything Goes
Role: Wallbreaker
MarshadOwO (Marshadow) @ Life Orb
Ability: Technician
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Bulk Up
- Poltergeist / Spectral Thief
- Shadow Sneak
- Close Combat / Ice Punch / Rock Tomb
Unlike in previous Generations where there was the omnipresent Arceus-Fairy and other formes to hinder Marshadow, as well as bulky Pokemon such as Primal Groudon which posed a good defensive counter to it. But, now this Generation of Galar has removed Primal Reversion and Almighty Arceus, as well as awarding Marshdaow with the 110 BP awesome Poltergeist. A Life Orb boosted Poltergeist hits almost as hard as Soul-Stealing 7-Star Strike, meaning you don't need it! There's also the lack of Ultra-Necrozma which would outsped and KO Marshadow as well.
Firstly, Marshadow has a long list of coverage moves ranging from Ice Punch, Rock Tomb, Iron Head, Outrage, Poison Jab, etc etc. but, we are gonna choose the moves that give a wide range of coverage that is only required to hit AG meta-game.
Bulk Up makes Marshadow a very potent wallbreaker. It boosts its mediocre Physical Defense stat to some levels, allowing it to set-up on common defensive Pokemon like Dusk Mane Necrozma, Ho-Oh (watch for Sacred Fire miss though), etc.
Poltergeist is a strong STAB with BP 110, 2HKOing many things. Most of the Pokemon have a non-consumable item, except probably Xerneas although you KO it with Shadow Sneak after a Poltergeist. Spectral Thief is a niche option due to having very less power and failing to 2HKO Specially Defensive Eternatus.
- 252+ Atk Life Orb Marshadow Spectral Thief vs. 240 HP / 0 Def Eternatus: 214-253 (44.4 - 52.5%) -- guaranteed 3HKO after Black Sludge recovery
On the other hand, Poltergeist is guaranteed 2HKO.
- 252+ Atk Life Orb Marshadow Poltergeist (110 BP) vs. 240 HP / 0 Def Eternatus: 261-308 (54.2 - 64%) -- guaranteed 2HKO after Black Sludge recovery
Shadow Sneak is strong priority boosted by Technician, for faster targets like Calyrex-Shadow which are generally very problematic. It generally also brings Choice Scarf Kyogre's HP to the range that it can't OHKO you with Water Spout as well.
- 252+ Atk Life Orb Technician Marshadow Shadow Sneak vs. 0 HP / 0 Def Kyogre: 149-177 (43.6 - 51.9%) -- 13.3% chance to 2HKO
- 252 SpA Kyogre Water Spout (84 BP) vs. 0 HP / 0 SpD Marshadow in Rain: 252-297 (78.5 - 92.5%) -- guaranteed 2HKO
Close Combat / Ice Punch / Rock Tomb is filler. Close Combat is STAB, 2HKOes Yveltal while Ice Punch hits Zygarde hard. Rock Tomb helps against Dynamax Yveltal, along with Ho-Oh. I prefer Close Combat or Ice Punch because Zygarde is hardest to break, Ho-Oh gets 2HKOed by Poltergeist while Dynamax Yveltal is something you would never want to stay to. Note that Ice Punch needs a Bulk Up before to OHKO Zygarde.
- +1 252+ Atk Life Orb Marshadow Ice Punch vs. 252 HP / 208+ Def Zygarde: 442-525 (105.2 - 125%) -- guaranteed OHKO
That's all about this set. Marshadow's Fighting+Ghost STABs hit all the meta neutrally, as well as getting Bulk Up to act as an solid Wallbreaker. Ditto is a worry but you had to improof it well. Marshadow acts well as an Dynamax sweeper, but take care of opponent's Zacian-C that still outsped and OHKO it. Choice Band along with one filler replacing Bulk Up is also an alternative. All in all, Marshadow is really fantastic physical attacker any team would appreciate.
Hope this helps!