Haha, this is a funny story.

A few weeks ago I went shiny hunting for a Stufful. I've tried to do this a few times already with no success. I was listening to this during the hunt:

[There should be a GIF or video here. Update the app now to see it.]

(This is why I planned to name it Sweet Dreams.)
So I went SOS calling for Stufful. After 49 calls, I got a shiny Stufful.

I hit the shiny Stufful with False Swipe because I wanted it at low health to put it to sleep with my Exeggutor.  I forgot that the Stuffuls knew Brutal Swing, which hits everyone. When I switched in the Exeggutor, the non-shiny Stufful used Brutal Swing and knocked out the shiny. I stared in horror at my screen. "Why did I just do that? I should've just knocked out the non-shiny one first." I'm just gonna pretend it had the ability Klutz and a modest nature (which aren't ideal for a Bewear) and move on.

Anyway, I wanted to continue the chain since I didn't have anything better to do. And yes, I kept listening to the video. It was at least an hour later, and I got to over 100 more calls than before. I was losing steam and about to give up again, but I was already so far in the chain that I didn't know if it was worth it to stop. But then...

I got another one! (Yes, it's hard to tell, I couldn't get the camera to focus. But this is a different shiny Stufful.) This one took 154 calls.

Game: Sun
Date: 5/3/2020
Method used: SOS (fail at 49, reclaim at 154)

So technically I got 2 shiny Stuffuls, I just happened to only catch one of them. It has the ability Fluffy (thank goodness, its other abilities aren't any good) and I think an impish nature?

I immediately evolved it (it was a few levels away from evolving anyway)