If you don't know what I am referring to, I am talking about the Pokemon that can be called into battle by wild Pokemon seeking help in Sun and Moon, also referred to as "SOS battles" by Serebii. In ordinary wild battles, Pokemon that appear will have a 50% of having the same nature as any Pokemon leading the party that has the ability Synchronize, and I am wondering if these SOS encounters are also subject to this.
I ask because I would like to catch a Mareanie with Merciless or Regenerator as its ability, and with a particular nature that I have on a Synchronize Abra. Mareanie is a rare Pokemon that can only be found through SOS encounters, so I'd like to know if Synchronize works before I bother trying to find an even rarer one with the nature I like.
(Even if it works, I still only have about a 5% or 0.25% chance of getting what I want depending on the location, which is going to be such a pain but oh well!)