REGARDING SPRITE ISSUES:
NOTE: If you are offline and cannot play the game online, download the newest spritepack from #spritepack-releases (NOT APPLICABLE FOR ANDROID)
If you have seen even a single custom or base sprite for any pokemon:
Your game is fine and working properly! The game can only download a limited number of sprites while playing before going on cooldown, you have simply hit the download cap for now.
If you still feel like your sprites are not download, ensure that you have your "download data" option enabled and your device is connected to the internet.
If you have not seen even a single sprite for any pokemon:
Your game is not working properly!
Step 1. Ensure you're on the latest version (check your title screen and compare with #downloads)
Step 2. Ensure you have a good internet connection.
Step 3. Check your options in a save, turn on "download data" if it was turned off.
Step 4. If that did not fix it: head to a pokecenter > talk to the man in a black suit with sunglasses and navigate to Sprite Settings and select "Reset sprite cache" & "Reset displayed alt sprites".
Step 5. If that did not fix it, delete any game or launcher folders and do a full reinstall.
Step 6. After reinstalling, repeat step 4.
If for some reason none of this works, type ?tag altdownload in #ask-a-bot and reinstall using those files (NOT APPLICABLE FOR ANDROID)