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Pokémon battle simulator.

Merge pull request #1690 from ascriptmaster/randoms

Random Battle: Update Cradily, Cacturne
latest commit 61eb39a5a1
@TheImmortal TheImmortal authored
Failed to load latest commit information.
chat-plugins Trivia plugin: fix crash in /trivia accept and /trivia reject
config OU is having a suspect test
data Merge pull request #1690 from ascriptmaster/randoms
lib Some cleanup in /modlog
logs Update logging documentation with newest features
mods Acid, Aurora Beam, Bubble and Bubblebeam fix
static Changes to static file serving
test Merge pull request #1656 from ascriptmaster/oldgens
tournaments Tournaments: Add missing period to full message
.gitignore Remove bannedwords feature
.travis.yml Cache node modules while testing
LICENSE License: Update copyright year to include 2015
Procfile Make Procfile specify Heroku's desired port readme: add build and dependency badges
app.js Simplify b6aea81
battle-engine.js Fix ModifyBoost in calculateStat
cidr.js More style fixes and Gulpfile updates
command-parser.js Fix broadcast cooldown message checking.
commands.js Allow /mee in PMs
crashlogger.js Update dependencies
dnsbl.js Update DNS reverse database
gulpfile.js Increase time limit for gulp-jshint
loginserver.js Add jscs as a style checker, and add some extra jshint options
old-simulator-doc.txt Tons of documentation
package.json Update dependencies Fix credits for Node.js chatbot in protocol docs
repl.js Fix wrong default path in repl.js
rooms.js Use the rated timer for tournament battles
simulator-doc.txt Tons of documentation
simulator.js Battle#resendRequest's argument is now a connection, rather than user
sockets.js Properly fix merge conflict from #1663
team-validator.js Fix crash in team validator
tools.js Make sure moves have the flags object
users.js Fix bug with autoconfirmed being lost
verifier.js Quit PS child processes when parent quits

Pokémon Showdown

Navigation: Website | Server repository | Client repository

Build Status Dependency Status devDependency Status


This is the source code for the game server of Pokémon Showdown, a website for Pokémon battling. Pokémon Showdown simulates singles, doubles and triples battles in all the games out so far (Generations 1 through 6).

This repository contains the files needed to set up your own Pokémon Showdown server. Note that to set up a server, you'll also need a server computer.

You can use your own computer as a server, but for other people to connect to your computer, you'll need to expose a port (default is 8000 but you can choose a different one) to connect to, which sometimes requires port forwarding (note that this isn't possible on certain internet connections).


Pokémon Showdown requires node.js, v0.10.2 and up. Install node.js if you don't have it yet; the latest stable version is a good choice to install.

Next, obtain a copy of Pokémon Showdown. If you're reading this outside of GitHub, you've probably already done this. If you're reading this in GitHub, there's a "Clone" button in the bottom of the right sidebar, or if you're really lazy, there's a "ZIP" download button. I recommend the Clone method - it's more time-consuming to set up, but much easier to update.

Pokémon Showdown is installed and run using a command line. In Mac OS X, open Terminal (it's in Utilities). In Windows, open Command Prompt (type cmd into the Start menu and it should be the first result). Type this into the command line:


Replace LOCATION with the location Pokémon Showdown is in (ending up with, for instance, cd "~/Downloads/Pokemon-Showdown" or cd "C:\Users\Bob\Downloads\Pokemon-Showdown\").

This will set your command line's location to Pokémon Showdown's folder. You'll have to do this each time you open a command line to run commands for Pokémon Showdown.

To install dependencies, run the command:

npm install --production

Copy config/config-example.js into config/config.js, and edit as you please.

Congratulations, you're done setting up Pokémon Showdown.

Now, to start Pokémon Showdown, run the command:

node app.js

You can also specify a port:

node app.js 8000

Visit your server at http://SERVER:8000

Replace SERVER with your server domain or IP. Replace 8000 with your port if it's not 8000 (the default port).

Yes, you can test even if you are behind a NAT without port forwarding: http://localhost:8000 will connect to your local machine. Some browser setups might prevent this sort of connection, however (NoScript, for instance). If you can't get connecting locally to work in Firefox, try Chrome.

You will be redirected to The reason your server is visited through is to make it more difficult for servers to see a user's password in any form, by handling logins globally. You can embed this in an iframe in your website if the URL is a big deal with you.

If you truly want to host the client yourself, there is a repository for the Pokémon Showdown Client. It's not recommended for beginners, though.

Setting up an Administrator account

Once your server is up, you probably want to make yourself an Administrator (~) on it.


To become an Administrator, create a file named config/usergroups.csv containing


Replace USER with the username that you would like to become an Administrator. Do not put a space between the comma and the tilde.

This username must be registered. If you do not have a registered account, you can create one using the Register button in the settings menu (it looks like a gear) in the upper-right of Pokémon Showdown.

Once you're an administrator, you can promote/demote others easily with the /admin, /leader, /mod, etc commands.

Browser support

Pokémon Showdown currently supports, in order of preference:

  • Chrome
  • Firefox
  • Safari
  • Chrome/Firefox/Safari for various mobile devices
  • Opera
  • Firefox for Android
  • IE9+

IE8 support can technically be added without too much difficulty, but it doesn't run PS fast enough to be usable.

As for older browsers (Firefox 3.6), I won't go out of my way to support them, but if there's a simple fix, you can suggest it to me and I'll implement it.


The Pokémon Showdown development IRC channel is #showdown at

You can also visit the Pokémon Showdown forums for discussion and help.


Pokémon Showdown's server is distributed under the terms of the MIT License.



  • Guangcong Luo [Zarel] - Development, Design


  • Hugh Gordon [V4] - Research (game mechanics), Development
  • Juanma Serrano [Joim] - Development
  • Leonardo Julca [Slayer95] - Development
  • [The Immortal] - Development

Retired Staff

  • Bill Meltsner [bmelts] - Development
  • Cathy J. Fitzpatrick [cathyjf] - Development
  • Mathieu Dias-Martins [Marty-D] - Research (game mechanics), Development


  • Andrew Goodsell [Zracknel] - Art (battle weather backdrops)
  • Ben Frengley [TalkTakesTime] - Development
  • Cody Thompson [Rising_Dusk] - Development
  • Kyle Dove [Kyle_Dove] - Art (battle backdrops)
  • Quinton Lee [sirDonovan] - Development
  • Robin Vandenbrande [Quinella] - Development
  • Samuel Teo [Yilx] - Art (main background)
  • Vivian Zou [Vtas] - Art (alternate main background)
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