Moon/Sun A Nightmare

[Bagel]

Prepare Yourself for the apocalypse, something bad, VERY bad, is approaching. When Poke Bank Is Released, Mega Rayquaza + Z crystal will rule the land. This is a very bad thing, Due to Z-Stat boost + M Rayquaza can sweep several teams in a blink. BEWEAR RAYQUAZA. To counter this, try a leech seed stall or status stall. Or you can try something else (Im here to warn, not counter xP).
Have fun while it lasts! Seeya!

 

[etrian_warrior]

M-Rayquaza will become death, destriyer of teams! Death to all who oppose! But dear arceus that is bad...

 

[Mr. Kream]

Puppy, if you're gonna try and stall mega rayray, or even regular rayray, you're already dead; he's in your house eating you alive, yeah, your nightmare.

 

[Bagel]

Can Mimikyu Switch Stall? Otherwise, Geomancy Xerneas might work

 

[Mr. Kream]

Most Geomancy Xern that haven't already set up will have a hard time setting up versus Dragon Asccent, mega rayray's a real monster, yo.

 

[MysticSniper]

Not possible for mega rayquaza to use a z move.

 

[Jisenku]

:3 Mega Stones working in Sun/Moon?