Universal Pokémon Randomizer ZX
Universal Pokémon Randomizer ZX is a free desktop tool for changing settings in Pokémon game files.
What Universal Pokémon Randomizer ZX is
Universal Pokémon Randomizer ZX is a free desktop tool for changing settings in Pokémon game files. It is a fork of the Universal Pokémon Randomizer with added features and support for additional games, including 3DS titles. Its options include changing Pokémon base statistics, evolutions, wild Pokémon, moves, and movesets. The release download is a ZIP archive that users extract and launch using scripts for Windows, Mac, or other Unix-based systems. It requires 64-bit Java 8 or higher. Documentation says the tool needs at least 4 GB of memory if Java’s own memory setting would otherwise leave it below that amount. For 3DS games, it accepts decrypted CCI, CIA, and CXI formats. Output can be a CXI file or a LayeredFS directory, which can be used 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 project is GPL-3.0 licensed. The wiki documents game-specific known issues, including some visual glitches and gameplay quirks; maintainers direct bug reports and help requests to GitHub issues and do not take feature requests.
Good
- Randomizes statistics, evolutions, wild Pokémon, moves, and movesets.
- Runs on Windows, Mac, and Unix-based systems.
- Supports decrypted 3DS game formats.
- Command-line mode supports settings files and optional logs.
Watch out
- Requires 64-bit Java 8 or higher.
- May need at least 4 GB of memory.
- Known game-specific visual and gameplay issues are documented.
- Maintainers do not take feature requests.
Who it suits
This tool suits Pokémon players who want to customize game files and can meet its Java requirement. Its 3DS support is relevant to users working with decrypted CCI, CIA, or CXI files.
Verdict
Universal Pokémon Randomizer ZX provides a range of game-setting changes across desktop platforms, including support for 3DS files. Check the Java and memory requirements and the documented issues before using it.
Plans and prices
From Universal Pokémon Randomizer ZX's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Universal Pokemon Randomizer ZX | Free | Downloadable desktop randomizer · source code available under GPL-3.0 |
The facts
Each one read from Universal Pokémon Randomizer ZX's own pages, with the date it was checked.
What it does
- 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.checked 8 Oct 2026
- 3DS support
- The tool supports randomizing mainline Pokémon games on 3DS and accepts decrypted CCI, CIA, and CXI formats.checked 8 Oct 2026
- CLI
- A command-line mode accepts input ROM, output ROM, and settings-file arguments, with optional LayeredFS output and log generation.checked 8 Oct 2026
- Desktop support
- Release instructions provide launchers for Windows, Mac, and other Unix-based systems.checked 8 Oct 2026
- Downloads
- The release page provides a ZIP download that users extract and launch with platform-specific scripts.checked 8 Oct 2026
- Intended users
- The wiki describes the application as a randomizer for Pokémon game files and provides separate guidance for users randomizing 3DS games.checked 8 Oct 2026
- Java requirement
- The randomizer requires 64-bit Java 8 or higher.checked 8 Oct 2026
- Known issues
- The project wiki documents game-specific known issues for the currently released version, including some visual glitches and gameplay quirks.checked 8 Oct 2026
- 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.checked 8 Oct 2026
- Purpose
- Universal Pokemon Randomizer ZX is a fork of the Universal Pokemon Randomizer with new features and support for additional games, including 3DS games.checked 8 Oct 2026
- Randomization settings
- Options include changing Pokémon base statistics, evolutions, wild Pokémon, moves, and movesets.checked 8 Oct 2026
- 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.checked 8 Oct 2026
- Support
- The maintainers direct bug reports and help requests to GitHub issues and say they do not take feature requests.checked 8 Oct 2026
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