Pokemon Randomizer

• Put your ROM files (.gb .gbc .gba .nds, decrypted .3ds/.cci/.cxi) in sd:/roms or folders inside it. The app also looks at the SD card’s root and the folders right under it (not system ones like Nintendo 3DS, luma or 3ds). Options › Scan folders adds any other folder, or leaves one out with everything inside it. Installed 3DS games and the game card are found by themselves.
• Tap Randomize, pick a game and a style: Casual, Standard, Chaos, or Custom, where the top screen explains every option. Several copies or ROM hacks of one game? Press Y or tap the pencil to give each its own name: it stays on the SD card, even if you move the file.
• Keep or roll a seed, then Generate. The same game, seed and settings code always give the same result, so you can race friends.
• The game is saved in its own folder, like sd:/3ds/pokemon-randomizer/randomized/Emerald-Randomized-U4DM/, with its spoiler log (Options › Randomized games folder can change where, and its + makes a new folder). Open it from Randomized games: How to play says how to start it.
• What changes: starters, wild Pokémon, trainers, legendaries and gifts, in-game trades, stats, types, abilities, evolutions, moves and TMs, items on the ground, and the shiny odds of wild Pokémon (Gen 2 to 7: pick a preset or type your own, like 1 in 36), with a spoiler log for when you’re stuck. Every family catchable (Customize › Wild) gives the first form of every evolution family a wild spot, so the whole Pokédex can be filled in one game.
• Updates: the app checks GitHub for a new version when it starts and asks before downloading it (turn it off in Options › Check for updates). It works from version 2.1.0 on; older versions update with the QR code. After an update, the app shows once what’s new, and Options › What’s new lists every version’s changes.
• The HOME Menu: turn on HOME on the seed screen (or pick Add to HOME Menu on the game’s page) and the randomized game gets its own HOME Menu icon, with the name you gave it. It needs the CIA build, started from the HOME Menu. GB to DS games also get an animated banner with that name.
• GB and GBC games start in mGBA. Install its development build: in Universal-Updater, pick mGBA and install “[git] mgba.cia” (the stable mGBA can’t open a game from another icon).
• GBA games become a Virtual Console title with its own save, in the 3DS’s own GBA mode (about a minute to install). Quit with HOME, then A: the save is written only then.
• DS games start with nds-bootstrap. Install the “YANBF Forwarder Pack” with Universal-Updater.
• 3DS games become a full copy with their own save (about 50 minutes on a New 3DS XL). The quick way is Activate in Luma, which plays it through Luma3DS game patching with the original game’s save, so back that save up with Checkpoint first.
• Without the HOME Menu, GB, GBC and GBA games play in mGBA or any emulator; DS games in TWiLight Menu++ or on a flashcart.

At least one game of every generation was randomized and played on a New 3DS XL. English releases are the tested ones; please report anything that goes wrong.