A Gen 7 Buff (like a Gen 6 Buff) is a stat buff change to Pokemon from Gens 1-5. It could also mean new moves that a Pokemon can now learn in Gen 7 (such as Mantine now being able to learn Roost and Flygon now being able to learn Dragon Dance), but that doesn’t translate into Pokemon GO.

Here are the links that show the Gen 6 and Gen 7 stat changes:

http://www.serebii.net/xy/updatedstats.shtml

http://www.serebii.net/sunmoon/updatedstats.shtml

Are Gen 7 Buffed Stats Applied To Pokemon GO Yet?

Unfortunately, no. Niantic’s still using Gen 6 stats so far. Anyways, here’s if Gen 7 Stats Were Applied To Gen 1 (No Alolan Forms) and Gen 2 for Pokemon GO:

Pokemon Gen Attack Defense Stamina Old CP New CP (Gen 7)
Arbok 1 185 158 120 1,737 1,908
Dugtrio 1 205 147 70 1,333 1,612
Farfetch’d 1 167 118 104 1,092 1,430
Dodrio 1 223 148 120 2,138 2,205
Electrode 1 176 182 120 1,900 1,945
Exeggutor 1 233 161 190 2,916 2,945
Noctowl 2 161 179 200 2,040 2,245
Ariados 2 161 130 140 1,636 1,700
Qwilfish 2 184 166 130 1,910 2,013
Magcargo 2 155 209 120 1,543 1,857
Corsola 2 118 175 130 1,214 1,378
Mantine 2 148 260 170 2,032 2,310

How’ You Find The Supposedly New CP For Pokemon GO?

I used this formula to find the Gen 7 buffed stats of Pokemon. (discovered by /u/CustomOndo)

Wouldn’t They Apply Them Only When Gen 7 Actually Comes Out?

Now this is the kind of confusion that I’ve heard from some people. Anyways, if Niantic had already applied Gen 6 stat buffs to Pokemon GO (even though only Pokemon from Gens 1 and 2 are out), then why wouldn’t they apply Gen 7 stat buffs? But maybe it’s to come with the gym rework. Who knows?

So yeah. Hope this helps you to understand about what a Gen 7 stat buff is and how it’d affect Pokemon GO. (can’t do a good outro, as always. :P)