To start, you need a clean, unedited Pokémon HeartGold ROM file (usually ending in .nds ). Legally, you should dump this file from your own physical Nintendo DS cartridge using a hacked DS or 3DS system. Step 2: Download the Universal Pokemon Randomizer (UPR)
Download the on your PC or Mac.
. Ensure you own a physical copy of the game before downloading.
If you used a PC, move the new randomized ROM to your Android device.
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