How do I recover my Pokémon Go account?
If you can't access your Pokémon Go account, your account was hacked, or you need to reset your password, here's how to recover your Pokémon Go account.

If for some reason you have lost your Pokémon GO account, there is no need to panic. It is possible to recover it and enjoy your favorite game again. However, it is essential to remember that Pokémon GO does not store user account passwords. So if you can't remember your account details, they can only be retrieved through your login provider. The most common login providers include Facebook and Google. Therefore, the process of recovering your account will depend on your login provider.

Tips for Pokemon Showdown Admins to Reset Your Password

Have a public room authentication with "Voice" or higher
Smogon Badge Holder
Use the private account reset thread.
Room authentications without credentials
PM Teclis or DaWablefet for assistance
There is a known backlog of password and account requests right now in the Pokémon Showdown community, so don't expect a response right away.
https://www.not-working.co/pokemon-go-account-password-reset