Got the Slowpoke/Police event today. Wasn't very interesting IMO. I also found Alolan Dugtrio although I only saw the back of its head. Not sure if there's a way to get it to turn around but it looked pretty funny anyway. Only need to find Sina and Dexio now and I'll have seen all available events.
EDIT: Found Sina and Dexio.
Just keep looking. It turned around for me after my 3rd or 4th time looking at it.