Final Fantasy I Randomizer vs Universal Pokémon Randomizer ZX

Final Fantasy I Randomizer is a free browser tool for changing the original US 8-bit NES Final Fantasy game. Upload a compatible ROM, choose a seed and flags, then generate a randomized ROM file or spoiler log. Settings can move key item locations, towns, and dungeons, and change monster and fiend difficulty. Presets include Improved Vanilla, intended to make the original game more welcoming to new players, as well as Floor and Entrance Shuffle, Shard Hunt, Chaos Rush, and Chaos Rampage. More detailed options cover maps, treasures, shops, enemies, party, classes, gear, and other gameplay areas; cosmetic choices include music, palettes, sprites, and interface behavior. Users can save presets, export them to JSON, and load them later. The browser interface runs locally without an installation, but playing the output requires a NES ROM and an emulator or compatible device. The randomizer works only with the US ROM version. Its maker recommends using a legally owned ROM and does not provide a download link. A seed can be recreated when the version and flags match, except for cosmetic Fun% settings.

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.