These often contain malware or outdated bugs. The safest method is always to download the randomizer tool yourself and apply it to a clean ROM you already own.
Keep things weird by making Pokémon evolve into completely different species. Catch 'Em All: Pokemon Sun Randomizer Rom
At its core, a randomizer ROM (Read-Only Memory) is a patched version of the original Pokémon Sun game file, designed to be played via emulation. Using external software, players can "randomize" nearly every aspect of the game: wild encounters, static gifts, trainer parties, move sets, abilities, and even the types of Poké Balls sold in shops. The most ambitious settings allow for "completely random" starters, where a player might begin with a legendary like Kyogre or a weak early-route Pokémon like Yungoos. This procedural generation creates a fundamentally new game from the same underlying engine. These often contain malware or outdated bugs
Have you tried a Pokémon Sun randomizer run? What was the most broken Pokémon you encountered on Route 1? Let the chaos begin! Catch 'Em All: At its core, a randomizer
At its core, a "ROM" is a digital copy of the original game data from a Pokémon Sun cartridge. A "Randomizer" is a software tool that edits that ROM to change static values—wild Pokémon, trainer parties, static encounters (like the Snorlax blocking the road), item placements, and even move sets.