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SPECIFICTION
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Universal Pokémon Randomizer ZX

github.com

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Spec score 7.3 #17 of 24 in Game Randomizer Tools

What it is

Universal Pokémon Randomizer ZX is a desktop tool for randomizing Pokémon game files. It is a fork of the Universal Pokemon Randomizer with added features and support for more games, including 3DS titles. Settings can change Pokémon base statistics, evolutions, wild Pokémon, moves, and movesets. The tool supports Windows, macOS, and Linux/Unix, and the release page provides a ZIP package to extract and launch with platform-specific scripts. It requires 64-bit Java 8 or higher; documentation says it needs at least 4 GB of memory when Java's memory setting would otherwise limit it below that. For 3DS games, it accepts decrypted CCI, CIA, and CXI formats. Randomized 3DS output can be a CXI file or a LayeredFS directory, usable with an emulator or a 3DS with custom firmware. A command-line mode accepts input ROM, output ROM, and settings-file arguments, with optional LayeredFS output and log generation. The software is free, with source available under GPL-3.0. Maintainers direct bug reports and help requests to GitHub issues and do not accept feature requests.

Spec sheet

Purpose
Universal Pokemon Randomizer ZX is a fork of the Universal Pokemon Randomizer with new features and support for additional games, including 3DS games.Read 8 Oct 2026 · github.com
Intended users
The wiki describes the application as a randomizer for Pokémon game files and provides separate guidance for users randomizing 3DS games.Read 8 Oct 2026 · github.com
Support
The maintainers direct bug reports and help requests to GitHub issues and say they do not take feature requests.Read 8 Oct 2026 · github.com
3DS output
For 3DS games, randomized output can be a CXI file or a LayeredFS directory, and LayeredFS can be used with an emulator or a 3DS with custom firmware.Read 8 Oct 2026 · github.com
3DS support
The tool supports randomizing mainline Pokémon games on 3DS and accepts decrypted CCI, CIA, and CXI formats.Read 8 Oct 2026 · github.com
CLI
A command-line mode accepts input ROM, output ROM, and settings-file arguments, with optional LayeredFS output and log generation.Read 8 Oct 2026 · github.com
Desktop support
Release instructions provide launchers for Windows, Mac, and other Unix-based systems.Read 8 Oct 2026 · github.com
Downloads
The release page provides a ZIP download that users extract and launch with platform-specific scripts.Read 8 Oct 2026 · github.com
Java requirement
The randomizer requires 64-bit Java 8 or higher.Read 8 Oct 2026 · github.com
Known issues
The project wiki documents game-specific known issues for the currently released version, including some visual glitches and gameplay quirks.Read 8 Oct 2026 · github.com
Memory requirement
The documentation says the randomizer needs at least 4 GB of memory when Java's memory setting otherwise limits it below that amount.Read 8 Oct 2026 · github.com
Randomization settings
Options include changing Pokémon base statistics, evolutions, wild Pokémon, moves, and movesets.Read 8 Oct 2026 · github.com
Security and trust
The repository identifies the project as GPL-3.0 licensed; the opened project pages do not state security certifications or compliance claims.Read 8 Oct 2026 · github.com

Plans and prices

Universal Pokemon Randomizer ZX Free Downloadable desktop randomizer · source code available under GPL-3.0 Read 8 Oct 2026 · github.com

Every Universal Pokémon Randomizer ZX plan and price →

Strong points and limits

Strong points

  • Settings cover stats, evolutions, wild Pokémon, and moves
  • Supports 3DS game formats and LayeredFS output
  • Command-line mode supports settings files and logs
  • Source is available under GPL-3.0

Limits

  • Requires 64-bit Java 8 or higher
  • May need at least 4 GB of memory
  • Maintainers do not take feature requests
  • Known issues include visual glitches and gameplay quirks

Who it suits

It suits Pokémon game-file randomization on supported desktop systems, including users customizing 3DS titles. Users should be prepared to provide the required Java version and memory, and to work with decrypted 3DS files where relevant.

Verdict

Universal Pokémon Randomizer ZX offers broad settings for randomizing game files, including support for 3DS formats and command-line use. Check the Java and memory requirements, and review the documented game-specific issues before choosing it.

Where Specifiction places it

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