Okay so yeah, seems I eyeballed it pretty spot on.
These pokemon are just sitting there with the usual placeholders:
-23 unown. a, b, d, f, g, h, j, k , l, m, o, p, q, r, s, t, u, v, w, x, y, z
-Zygarde Core & Zygarde Cell
-8 winking pokemon: Clefable, Marill, Shroomish, Plusle, Minun, Pachirisu, Dedenne, Aromatisse
-3 emotion pikachu: Disappointed, Teary, Dejected (might have the names wrong)
A few possibilities here.
First off is just straight up they're going to go unused. Maybe they decided against adding all those winking pokemon and clogging special stages with unown, maybe they thought there was enough pikachu (BIT LATE FOR THAT), maybe they didnt want to add pokemon you can't actually obtain in the main games..who knows! We've already seen them decide against adding things in the past: Zen Mode Darmanitan & Overcast Cherrim were in the game at the start and then just removed, they obviously skipped over the 5 cosplay pikachu, the alola update didnt have some forms Midnight Lycanroc and they've had abilities in the code that either went unused or were straight up removed.
Second idea is while putting together the schedule, they forgot to include some of these pokemon in other content, like extra pokemon in the assorted safaris. Because they added so much uneeded crap that it's theoretically easy to overlook things. We could see an update eventually that just quietly adds them in before they're set to go live. The gigalith one would easy fit in a winker or two, for example.
Third, they're planned as give aways but they haven't automated that. Note there's no give aways anywhere in the schedule and hte last time they set one up (the monthly pikachus) they totally messed it up. It's an awful lot of give aways, but I could see giving out the pikachus and zygardes i guess.
Fourth they'll have another update in like July that changes out or adds some of the stages for these things and that will be the endless loop.
Personally I'm leaning towards the first option. Completely neglecting every unown (I don't think the NICE safari is repeating at all) seems like a conscious decision. It's also probably not coincidental that of the winking pokemon, they just happened to decide against releasing any of the pikaclones (+marill); though why Delcatty over Shroomish or Clefable we'll never know. Pikachu........well honestly that could have been a mistake. There was just too many of them.
If there's a physical version of shuffle maybe they'll be rolled into there as ~exclusive content~. But I'm not sure there will be a physical version because I think they would need to completely overhaul the game to accomodate it. The game is absolutely functioned towards "grind or pay up"which won't fly in a game you are paying $30 for. And they would probably not have online check ins and special stages need to be fixed up in some fashion probably...
Finally it is absolutely laughable how the back half of the game has been like 80% trash repeat stages for no reason. Chansey & Blissey got 2 reruns and only a minor amount of special stage pokemon were ever retired. Not even getting into the UX stages and how the ONLY DIFFERENCE is double HP & you get the attack doubler item; the early stages dont even give out PSBs if you for some reason really wanted that. Who wanted this? Why?
e: IF this is a mistake, I bet it will be fixed sooner than later. You don't put out automation like this and come back months later going "OH RIGHT" so like within a month probably.
