Ok, I see the problem and I'll upload the plugin with the fix soon. I'm not testing it on v21.1 so comment here any other issues that arise so I can fix them.
The plugin should already come with that function included. You can check it at Lin's Weather System/01 - Main Code/03 - Handler. On line 20 there should be the line weather = :None if PBDayNight.isNight? && weather == :Sun.
If it's not working for you, check if :None, :Sun or...
I don't know how it exactly works on v21.1, but on v20.1 you just needed FollowingPkmn.start_following. You also had to use it after the player got a pokemon or the pokemon wouldn't show once the player got it.
I still have to go through all my plugins to update the images again, but if you look in the overview, you'll see that there are two spoilers that say "IV and EV Summary Screen" and "All Stats Summary Screen". Those two have both IV and EV on the same page (All Stats has some more info like base...
Ah, I think I know. I copied the code scene for the watch background so it can change with the theme and it overwrites the configuration on your plugin, I think. I completely forgot I did that, to be honest. I'll post an update when I fix it.
I know it was made to support the existing outfit system. I am using that system. I was just suggesting the idea of pockets as a way to reduce the size of the list when there are a lot of clothes. I, for example, made one pocket for each season and another for "special" clothes like Team...
For more autotiles (just one more, but still more) to work with this, here are the arrow ones used in Team Rocket's hideout in the casino: Tiles - Animated Spin Tiles.