# Showdex

> Pokémon Showdown extension that harnesses the power of parabolic calculus to strategically extract your opponents' Elo.

Canonical page: [https://chrome-stats.com/d/showdex](https://chrome-stats.com/d/showdex)

## Overview

- **ID:** `showdex`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Tize.io
- **Category:** games-entertainment
- **Daily users:** 9,036
- **Weekly downloads:** 163
- **Rating:** 4.96 / 5 (27 ratings)
- **Version:** 1.4.1
- **Last updated:** 2026-07-17
- **First published:** 2022-09-09
- **Size:** 3.80 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/showdex/)
- **Website:** [https://www.smogon.com/forums/threads/showdex-an-auto-updating-damage-calculator-built-into-showdown.3707265](https://www.smogon.com/forums/threads/showdex-an-auto-updating-damage-calculator-built-into-showdown.3707265)

## Description

**Showdex** is a powerful Chrome extension designed for Pokémon Showdown players who want to enhance their competitive gameplay. By embedding an advanced damage calculator directly into the Showdown interface, it synchronizes automatically during battles, allowing players to perform up to 10 times more damage calculations with ease.

This extension not only saves valuable time by reducing manual clicks but also provides comprehensive information such as Smogon pages, move sets, and detailed descriptions of abilities, items, and moves. Praised by top competitive players for its convenience and efficiency, Showdex helps users focus more on strategic decision-making and less on configuration. Whether you're a casual player or a serious contender, Showdex is an indispensable tool for elevating your Pokémon battling experience.

## Rankings

- #828 — Overall
- #62 — Games & Entertainment
- #31 — calculus
- #34 — show
- #71 — winner
- #102 — shop

## Permissions and access

### Permissions

- `clipboardRead`
- `clipboardWrite`
- `*://play.pokemonshowdown.com/*`
- `*://*.psim.us/*`
- `*://play.radicalred.net/*`

### Content script matches

- `play.pokemonshowdown.com`
- `*.psim.us`
- `play.radicalred.net`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users find Showdex a clean, efficient tool that significantly saves time and accurately computes most damage calculations in Pokémon Showdown. However, recurring issues include difficulty detecting enemy tera types in some battle modes, incorrect move effectiveness displays, and iOS Firefox compatibility problems. Despite these, many users appreciate its ease of use and consider it a valuable asset that could be perfect with further polish.

### Pros

- Saves significant time when using Pokémon Showdown.
- Provides accurate damage calculations for the majority of cases.
- Clean and easy-to-use interface that users appreciate.
- Effective tool for 'easy-verify' damage calculations.

### Cons

- Issues with registering enemy tera types in Random Battles mode.
- Problems displaying move effectiveness correctly, sometimes showing moves as immune or N/A when they should hit.
- Compatibility issues on iOS with Firefox, prompting download even when already installed.

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- [TypDex - English version](https://chrome-stats.com/d/rogue-typdex-english-version) — 3 users
- [Showdown Teambuilder Analytics](https://chrome-stats.com/d/showdown-teambuilder-analytics) — 40 users, 5.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/showdex)