Ninetales-Alola (F) @ Never-Melt Ice / Life Orb / Icium Z
Ability: Snow Warning
EVs: 252 SpA / 252 Spe / 4 SpD
- Aurora Veil
- Extrasensory / Hidden Power [Ground]
- Moonblast / Dazzling Gleam
No disrespect, but let me start by saying that holding items like Light Clay and Icy Rock seem to be a waste UNLESS you plan on throwing out more than one Ice Pokemon in which then, that may be useful. Why is that? Well, if people battled to battle and not switch out their Pokemon 30 times in one battle because they didn't train their Pokemon for coverage, then there is no need for the worry of running out of Snow Warning or Aurora Veil. With that said...if you threw out A-Nine (A-9), then most likely, the reason you threw her out was because the Pokemon in front of you may not survive a Blizzard or two.
Moving on... Aurora Veil should be the opener as it reduces both special attacks and physical attacks and partners well with Snow Warning. Blizzard hits like a train and has a (STAB). Extrasensory and Hidden Power [Ground] can cover weaknesses. That isn't a bad thing seeing as one of A-9's primary stats is speed... so she may actually go first and take a decent chunk out of anything that dares an attempt to prey on her. Do keep in mind that you may not get Hidden Power [Ground] as my HP would be Steel if I went with it. I fought someone and theirs was ground and Legolas21 posted ground so I guess it's possible and those two trainers are the only reason I am even posting HP as an option. Last could be Moonblast for single target battles OR Dazzling Gleam for Double or Triple Battles. SO, for those people out there that think Moonblast is a "given," it's not. Dazzling Gleam may not hit as hard as Moonblast, no, but it has way better coverage as far as hitting multiple Pokémon and can still cause some trouble for other teams or Pokemon weak to Fairy moves. Both moves also come equipped with a (STAB) and both depending on what you're doing are excellent choices.
There are many ways to build a Pokémon and many different people each have an opinion as I too, have mine. Good luck with all your builds. :-)