pokemon-showdown/sim
Ivo Julca 29f778f233 Stricter typing for formats and rules
- Legacy effect type ``Ruleset`` removed
- New type ``RuleValueType`` for ``rule.hasValue``
- New interface ``RuleTableBuildContext`` for ``onValidateRule`` handlers
- New interface: ``RuleEventMethods`` extending ``EventMethods``
- ``data/rulesets.ts``: Different tag-discriminated types for
  ``effectType='Rule'`` vs ``effectType='ValidatorRule'``:
  ``RuleData`` vs ``ValidatorRuleData``.
- ``data/rulesets.ts``: Renamed ``FormatDataTable`` to ``RulesetTable``
- Distinguishes types for formats in ``config/formats.ts`` vs in ``Dex.data.Rulesets``:
  ``FormatData`` vs ``LoadedFormatData``.
- Union type for formats OR rulesets in ``Dex.data.Rulesets``: ``RulesetData``
- Implements ``DexFormats#find|some``, for searches excluding rules.
- Remove obsolete comment regarding former lack of support for format.onResidual
2026-04-16 12:02:45 -05:00
..
examples Update to ESLint 9 (#10926) 2025-02-25 20:03:46 -08:00
tools Implement Mega Stones as {key: value} pairs (#11684) 2026-01-08 14:59:22 -07:00
battle-actions.ts Champions: Fix Piercing Drill and Unseen Fist (#11917) 2026-04-11 23:55:02 -06:00
battle-queue.ts Gen 1: Implement move slot tracking (#11812) 2026-03-21 23:20:38 -07:00
battle-stream.ts Refactor editbattle not to use eval (#11898) 2026-04-07 13:58:01 -07:00
battle.ts Champions: Fix Piercing Drill and Unseen Fist (#11917) 2026-04-11 23:55:02 -06:00
dex-abilities.ts Support inheritance of ability, item, and move conditions (#11754) 2026-03-19 03:44:48 -07:00
dex-conditions.ts Stricter typing for formats and rules 2026-04-16 12:02:45 -05:00
dex-data.ts Implement Mega Stones as {key: value} pairs (#11684) 2026-01-08 14:59:22 -07:00
dex-formats.ts Stricter typing for formats and rules 2026-04-16 12:02:45 -05:00
dex-items.ts Implement Champions (#11910) 2026-04-10 20:29:01 -06:00
dex-moves.ts Champions: Fix Piercing Drill and Unseen Fist (#11917) 2026-04-11 23:55:02 -06:00
dex-species.ts Champions: Encore, Mega Sol and validations fixes (#11914) 2026-04-11 10:07:58 -06:00
DEX.md Move packed team docs out of PROTOCOL.md 2021-06-10 15:04:25 -07:00
dex.ts Stricter typing for formats and rules 2026-04-16 12:02:45 -05:00
field.ts Update to ESLint 9 (#10926) 2025-02-25 20:03:46 -08:00
global-types.ts Stricter typing for formats and rules 2026-04-16 12:02:45 -05:00
index.ts Update to ESLint 9 (#10926) 2025-02-25 20:03:46 -08:00
NONSTANDARD.md Move packed team docs out of PROTOCOL.md 2021-06-10 15:04:25 -07:00
pokemon.ts Let Format#pokemon be merged just like battle, side, actions (#11926) 2026-04-14 15:51:02 -06:00
prng.ts Correctly support Node 18 2025-02-26 21:42:14 -08:00
README.md Slightly improve documentation 2021-11-13 14:17:47 -05:00
side.ts Fix Gen 1 multi-turn move interactions with Haze, Metronome and Mirror Move (#11859) 2026-04-05 02:43:15 -07:00
SIM-PROTOCOL.md SIM-PROTOCOL: Update for clarity 2025-05-13 13:29:53 -07:00
SIMULATOR.md Slightly improve sim docs for stdio usage 2024-01-17 21:23:20 -08:00
state.ts Remove useless spreads (#11132) 2025-05-24 16:19:48 -07:00
team-validator.ts Finish server-side Champions changes 2026-04-10 20:38:50 -06:00
TEAMS.md Implement Champions (#11910) 2026-04-10 20:29:01 -06:00
teams.ts Implement Champions (#11910) 2026-04-10 20:29:01 -06:00
tsconfig.json Migrate to esbuild for compilation (#9203) 2022-12-22 15:19:29 -06:00

Node.js package

Pokémon Showdown has a Node.js API. It currently only works in Node, not browsers, although we're working on unifying it to work in browsers.

You can install it with the usual:

npm install pokemon-showdown

And you can use it to do the following things:

Simulating battles

See: sim/SIMULATOR.md

Also available as a command-line API!

Validating, generating, and converting teams

See: sim/TEAMS.md

Also available as a command-line API!

Getting Pokédex information

See: sim/DEX.md

Undocumented APIs

Pokémon Showdown's Node.js package has TypeScript definitions for everything it exports, including a lot of undocumented APIs.

Please be aware that any undocumented API is unstable and should not be relied upon not to change. We do not follow semver for undocumented APIs. If you really want to use an undocumented API, remember to pin the exact PS version in your dependencies. You probably also want to follow the API update channel in the Discord server: https://psim.us/devdiscord