Today, I finally started a save file on my Sun. Since I played as the boy on Moon, I chose the girl on this game. I picked Popplio as my starter and then got through all the intro stuff as quickly as possible until I reached the first Pokemon Center. That seemed to be the earliest that trading became available, which I needed because I wanted to trade over eggs so that my team members would have my Sun's OT.
Then, I went back to Moon to get some eggs to trade over. First, I collected some more Popplio eggs and saved, then hatched them and checked their IVs. I found a Popplio with a perfect Special Attack IV, so I soft reset and traded the egg over to Sun. After running around a lot, the egg hatched and I traded the Popplio back to Moon since I'll EV train in later.
After that, I started breeding two of the Moonblast Vulpix I hatched the other day. I plan on running Hidden Power on my Ninetales, so I had to check the HP type of each of the Vulpix. Took me quite a while to get the type I wanted, reminding me of why I usually avoid using Hidden Power. Anyway, I eventually hatched a Vulpix with my desired HP, so I reset again, traded its egg to Sun to hatch, then traded it back.
Next, I returned to the Malie Library with my Persian in my party. I needed it to get the Love Ball from Samson. Once I got it, I went over to the Melemele Meadow to catch a female Cutiefly. It took me a while to find one, partly because I ran into a lot of Caterpie and Petilil, and partly because I wasted a lot of time in a battle against a male Cutiefly trying to get it to SOS in a female one (so many "it's help didn't appear!!1!" fails). Eventually, I ran into a female normally, and caught it in my Love Ball since I want my Sun Ribombee to be in that ball. After catching it, I checked its summary and found out that it had the right Nature, which was awesome.
With Cutiefly caught, I returned to the nursery and bred it with the Clefairy I levelled up yesterday. I hatched a batch of Love Ball Cutiefly and checked their IVs. One had a max Sp. Attack IV, so I decided to buy a Power Lens with all of my BP and give it to the Cutiefly so that the IV could be passed along to all of the offspring (and I will need the item for EV training later, anyway, and I don't have enough perfect IVs to warrant use of the Destiny Knot yet). After swapping out my nursery Pokemon and hatching and checking more offspring, I found a Cutiefly I was happy with and did the same reset, trade to Sun, hatch, trade back to Moon as before.
So, I was able to breed for 3 of my Sun Pokemon today! I'll start breeding for the second half of my team tomorrow, though I have to catch some Pokemon first.
Aside from breeding, I tried earning some more Battle Points on Moon since I'll need them to buy more Power Items. I went to the Battle Tree and tried the Single mode several times with different combinations of my ingame team. The longest streak I was able to get was 2 wins lol. Yeah, my ingame Pokemon really aren't cut out for that place. Once I was tired of the Tree, I returned to Royal Avenue. My Pokemon continued to do poorly in the Battle Royales, but they somehow pulled off the win in the last one I did tonight! I got my BP back up to 10 iirc.