Pokemon Showdown is a free online battle simulator for the popular game franchise, Pokemon. It allows players to create their own teams of Pokemon and battle against other players from around the world.

The simulator includes a variety of battle formats, including singles, doubles, and triples, as well as various tiers and rulesets to choose from. Players can also customize their avatars, team names, and battle messages to personalize their experience.

In addition to battling, Pokemon Showdown also features a chat system where players can communicate with each other, share strategies, and make new friends.

Overall, Pokemon Showdown provides a fun and challenging way for Pokemon fans to test their skills against other players and build their dream teams.