This is strictly a side note:
252 SpA Mewtwo-Mega-Y Psycho Boost vs. 252 HP / 252+ SpD Arceus: 196-232 (44.1 - 52.2%) -- guaranteed 3HKO after Leftovers recovery
252 SpA Mewtwo-Mega-Y Secret Sword vs. 252 HP / 252 Def Arceus: 176-208 (39.6 - 46.8%) -- guaranteed 3HKO after Leftovers recovery
252 Atk Mewtwo-Mega-Y V-create vs. 252 HP / 252 Def Arceus: 152-179 (34.2 - 40.3%) -- 44.9% chance to 3HKO after Leftovers recovery
Plus it is immune to Moongeist Beam.
This makes it then a guaranteed Check/Counter to Non-Life Orb MMY.
Before you say: Unaware Arceus is not common, just bear in mind it is the first set listed in the Setpedia, and after the fix to the glitch that now makes Imposter match your Arceus’ Typing, there will be a greater cause for making Arceus adopt another ability than the now (rather) pointless “Soundproof” set.
Setpedia Set:
Take a hit, Spectral Thief, Shore Up, Core Enforcer, etc.
This is just a side note to respond to:
It’s beaten only by Life Orb MMY.
All hail Arceus.
For any Stealth Rocks Calcs:
252 SpA Mewtwo-Mega-Y Psycho Boost vs. 252 HP / 252+ SpD Arceus: 196-232 (44.1 - 52.2%) -- guaranteed 3HKO after Leftovers recovery
252 SpA Mewtwo-Mega-Y Secret Sword vs. 252 HP / 252 Def Arceus: 176-208 (39.6 - 46.8%) -- guaranteed 3HKO after Leftovers recovery
252 Atk Mewtwo-Mega-Y V-create vs. 252 HP / 252 Def Arceus: 152-179 (34.2 - 40.3%) -- 44.9% chance to 3HKO after Leftovers recovery
Plus it is immune to Moongeist Beam.
This makes it then a guaranteed Check/Counter to Non-Life Orb MMY.
Before you say: Unaware Arceus is not common, just bear in mind it is the first set listed in the Setpedia, and after the fix to the glitch that now makes Imposter match your Arceus’ Typing, there will be a greater cause for making Arceus adopt another ability than the now (rather) pointless “Soundproof” set.
Setpedia Set:
Bulky Anti-Setup
Arceus @ Safety Goggles
Ability: Unaware
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Timid Nature
- Spectral Thief / Haze
- Shore Up
- Entrainment / Core Enforcer / Boomburst
- U-turn
*Due to Sleep Clause I could see Leftovers being used, hence my Calcs, and Timid seems strange for something using Spectral Thief and U-Turn, so I think a +SpD nature suits it better, as it won’t be staying in on a Physical Superpower Contrary anyways and thus won’t need a +Def nature.
Edit: Immunity to Moongeist leans Arceus towards SpD as well so it can handle things like Triage Rayquaza and Quiver Dance Kyogre. Lastly, going slower helps your Core Enforcer as well, such as against a Rayquaza-Mega.
Arceus @ Safety Goggles
Ability: Unaware
EVs: 252 HP / 252 Atk / 252 Def / 252 SpA / 252 SpD / 252 Spe
Timid Nature
- Spectral Thief / Haze
- Shore Up
- Entrainment / Core Enforcer / Boomburst
- U-turn
*Due to Sleep Clause I could see Leftovers being used, hence my Calcs, and Timid seems strange for something using Spectral Thief and U-Turn, so I think a +SpD nature suits it better, as it won’t be staying in on a Physical Superpower Contrary anyways and thus won’t need a +Def nature.
Edit: Immunity to Moongeist leans Arceus towards SpD as well so it can handle things like Triage Rayquaza and Quiver Dance Kyogre. Lastly, going slower helps your Core Enforcer as well, such as against a Rayquaza-Mega.
This is just a side note to respond to:
Arceus is ranked B+ on the Viability Rankings, and I am surprised no one bothered to include it in the discussion as an Unaware answer until my current post here.But there's no close to reliable Contrary MMY answer, other than a UR mon, Unaware Cresselia and Darmanitan-Zen. That's not great.
It’s beaten only by Life Orb MMY.
All hail Arceus.
For any Stealth Rocks Calcs:
252 Atk Mewtwo-Mega-Y V-create vs. 252 HP / 252 Def Arceus: 152-179 (34.2 - 40.3%) -- guaranteed 3HKO after Stealth Rock and Leftovers recovery
252 SpA Mewtwo-Mega-Y Secret Sword vs. 252 HP / 252 Def Arceus: 176-208 (39.6 - 46.8%) -- 0.4% chance to 2HKO after Stealth Rock and Leftovers recovery
252 SpA Mewtwo-Mega-Y Psycho Boost vs. 252 HP / 252+ SpD Arceus: 196-232 (44.1 - 52.2%) -- 78.5% chance to 2HKO after Stealth Rock and Leftovers recovery
So even with Stealth Rocks, it isn’t a guaranteed 2HKO, and it will survive (at Max Damage from both moves) a switch into Stealth Rocks, and V-Create followed by Psycho Boost as 40.3+12.5-6.25=46.55+52.2=98.75% factoring in Leftovers
252 SpA Mewtwo-Mega-Y Secret Sword vs. 252 HP / 252 Def Arceus: 176-208 (39.6 - 46.8%) -- 0.4% chance to 2HKO after Stealth Rock and Leftovers recovery
252 SpA Mewtwo-Mega-Y Psycho Boost vs. 252 HP / 252+ SpD Arceus: 196-232 (44.1 - 52.2%) -- 78.5% chance to 2HKO after Stealth Rock and Leftovers recovery
So even with Stealth Rocks, it isn’t a guaranteed 2HKO, and it will survive (at Max Damage from both moves) a switch into Stealth Rocks, and V-Create followed by Psycho Boost as 40.3+12.5-6.25=46.55+52.2=98.75% factoring in Leftovers
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