The IronMon challenge is a Pokémon Randomizer Challenge run created by Iateyourpie. Designed to make experiencing the randomizer fun and challenging, while taking away the wild Pokémon grind that come with some other challenges. It was originally made for Fire Red / Leaf Green but the rules can be applied/adjusted for other games as well. If you're interested to find out more about IronMon, join our Discord community!
IronMon has varying levels of difficulties, to keep it more approachable but also provide the toughest challenge possible for those who want it.