This is a repository for most of the client code for Pokémon Showdown. This is what runs play.pokemonshowdown.com. WARNING: You probably want the Pokémon Showdown server, if you're setting up a server ...
Testing The tests are listed in AGENTS.md ("Testing"). Most run without the game data, in GitHub Actions too. One check needs the retail maps, so it runs on your own computer (or on a self-hosted ...