Universal Pokémon Randomizer FVX
Universal Pokémon Randomizer FVX is a free, open-source desktop tool for changing data in vanilla core-series Pokémon games from Generations 1–7.
What Universal Pokémon Randomizer FVX is
Universal Pokémon Randomizer FVX is a free, open-source desktop tool for changing data in vanilla core-series Pokémon games from Generations 1–7. It supports Linux, macOS, and Windows, with the exceptions of Pokémon: Let’s Go, Pikachu! and Let’s Go, Eevee!. Users can randomize traits, evolutions, starters, moves, trainer and wild Pokémon, items, and type effectiveness. FVX adds palette randomization and custom player graphics, though generation support varies: palettes are fully supported in Generations 1–3, partially supported in 4–5, and unavailable in 6–7; custom player graphics work in Generations 1–3 only. A seed and settings string can reproduce a result, and logs can be disabled to avoid race spoilers. The tool requires users to supply their own ROM files. ROM hacks are not officially supported. For 3DS games, files must be decrypted; randomized output can be saved as CXI or LayeredFS, but loading a game update limits output to LayeredFS.
Good
- Free and open source
- Supports games across Generations 1–7, with exceptions
- Randomization settings cover Pokémon, items, and type effectiveness
- Seeds and settings strings reproduce results
- Logs can be disabled for races
Watch out
- Users must supply their own ROM files
- ROM hacks are not officially supported
- Palette randomization is unavailable in Generations 6–7
- Custom player graphics stop at Generation 3
Who it suits
This suits players who want to customize randomization in supported core-series Pokémon games on desktop systems. It also offers options for people sharing reproducible seeds or using randomized 3DS games with Citra or custom firmware.
Verdict
FVX offers a broad set of randomization options for supported vanilla games, plus seed sharing and selected graphics features. Check the generation-specific limits and provide your own compatible game files before using it.
Plans and prices
From Universal Pokémon Randomizer FVX's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Universal Pokémon Randomizer FVX | Free | Downloadable desktop application · requires game ROM files supplied by the user |
The facts
Each one read from Universal Pokémon Randomizer FVX's own pages, with the date it was checked.
What it does
- 3DS input
- For 3DS games, the wiki says the game files must be decrypted; supported formats include CCI/3DS, CIA, and CXI.checked 9 Oct 2026
- 3DS output
- Randomized 3DS games can be saved as CXI or LayeredFS; when a game update is loaded, only LayeredFS output is available.checked 9 Oct 2026
- FVX additions
- FVX adds Pokémon palette randomization and custom player graphics, alongside upgrades to trainer and wild Pokémon randomization.checked 9 Oct 2026
- Game support
- FVX supports vanilla core-series Pokémon games from Generations 1–7, except Pokémon: Let’s Go, Pikachu! and Let’s Go, Eevee!.checked 9 Oct 2026
- Graphics limits
- Custom player graphics are supported in Generations 1–3 and are not supported in Generation 4 or later.checked 9 Oct 2026
- Integrations
- The 3DS guide documents using randomized output with the Citra emulator or a 3DS running custom firmware.checked 9 Oct 2026
- Logs
- It can log randomization details, and the log can be disabled for races to avoid spoilers.checked 9 Oct 2026
- Palette limits
- Palette randomization has full support in Generations 1–3, partial support in Generations 4–5, and no support in Generations 6–7.checked 9 Oct 2026
- Project status
- The maker describes the Randomizer as an open-source project made possible by the Pokémon ROM-hacking community.checked 9 Oct 2026
- Purpose
- The Randomizer changes Pokémon game data, with optional randomizations and quality-of-life features.checked 9 Oct 2026
- Randomization options
- Options include changing Pokémon traits, evolutions, starters, moves, trainer and wild Pokémon, items, and type effectiveness.checked 9 Oct 2026
- Repeatable seeds
- The tool outputs a seed and settings string that can reproduce the same randomization results.checked 9 Oct 2026
- ROM hacks
- ROM hacks are not officially supported, though some may work at the user’s own risk.checked 9 Oct 2026
- ROM requirement
- The tool expects users to already have ROM files on their computer; the download page says users must find those files themselves for legal reasons.checked 9 Oct 2026
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