Any calcs with scizor switching in geomancy? How about metagross doing so? We already know this sucker gets psyshock, so poison-ceus might not be a nice answer... Who will ever force this out? Coz kyogre and normal arceus we could be forcing it out many times, but this one seems kinda impossible.
252/252+ Scizor @ Assault Vest takes
Moonblast: 36.04 - 42.73%
Focus Blast: 46.51 - 54.94%
And deals 43.14 - 51.77% in return with BP, which means it actually has a chance to beat Xerneas one-on-one (like about 7.42% chance)
252/252+ Metagross @ Assault Vest takes
Moonblast: 31.59 - 37.36%
Focus Blast: 40.93 - 48.35%
Although if you really want something that can is a sure counter, meet
252/252+ Victini @ Assault Vest
Moon Blast: 26.73 - 31.43%
Focus Blast: 17.07 - 20.29%
Psyshock: 23.76 - 27.97%
From there, it can use a 4 Atk V-Create to hit 103.55 - 121.82%