Okay.

So I was playing sun and moon.

I was in the Vast Poni Canyon, and I flew to the Pokemon center in Seafolk Village...

I walked inside, and talked to this guy, right?

He said "Let me show you something 'Eggcellent'!" And challenged me to a battle.

He sent out a shiny fucking Exeggute.

Sorry it's sideways, but anyways...

If you beat him he gives you not one, but 6 Nuggets.

...

......

Seems legit.