What's the best nature for a tanky Ninetales on a sun team? Is it a Bold/Calm? Or should I go a different direction and EV train a Timid Ninetales into a tank?

 

Bold nature is probably better to help balance out Ninetales' DEF and SPDEF stats. But Will-O-Wisp helps prevent physical damage when casted anyway. But I might need the Timid tanky Ninetales to survive long enough to case Will-O-Wisp against some fast physical attackers, but against those fast/physical attackers I could just cast Drought then switch poke and avoid those confrontations all together.

 

My best options:

With Ninetales you should always aim for a Timid nature. With this nature it puts it in a speed tier that allows it to outrun the likes of Timid Togekiss, Mamoswine, Lucario and other base 80-90 speed pokemon. If you want your ninetales to be bulky you can always use 252 HP / 252 Speed / 4 Sp Def EVs. :y:

284225 Togekiss

 

How common are the base 80-90 speed poke Timid in PROs PVP?

284286

284225 Togekiss

 

How common are the base 80-90 speed poke Timid in PROs PVP?

Timid Togekiss is extremely common. Lots of people use it from what I've seen so far.

284225 With Ninetales you should always aim for a Timid nature. With this nature it puts it in a speed tier that allows it to outrun the likes of Timid Togekiss, Mamoswine, Lucario and other base 80-90 speed pokemon. If you want your ninetales to be bulky you can always use 252 HP / 252 Speed / 4 Sp Def EVs. :y:

 

I agree with your defensive spread. Speed is mandatory for Ninetales, even on a defensive one, to outspeed key threats below 100 base speed and burn them with WoW before they can attack you

284347

284286

284225 Togekiss

 

How common are the base 80-90 speed poke Timid in PROs PVP?

Timid Togekiss is extremely common. Lots of people use it from what I've seen so far.

 

Exactly the kind of tips I was looking for. I'll start training that Timid one then.