A ROM is useless without an emulator. Here are the best options for your randomized SoulSilver experience.
If you're interested in trying out this ROM, make sure to download it from a reputable source and follow the instructions for installation. As with any ROM, be aware of the potential risks and ensure you're not infringing on any copyrights.
Yes. You need a flashcart (like an R4 card). Copy the randomized .nds file to the SD card of the flashcart and insert it into your DS.
A Randomizer is a third-party software tool that shuffles the data of a Pokémon ROM. It changes the game code to swap Pokémon locations, trainer battles, items, and even move sets.