What Exactly is the Pokemon Ironmon Challenge?

The Ironmon challenge was devised by a Twitch streamer called Iateyourpie. Designed for Pokemon FireRed and LeafGreen.

HARDEST POKEMON CHALLENGE EVER, Right on time to play more Pokemon for everyone :)

GitHub - Brian0255/NDS-Ironmon-Tracker: An ironMON tracker for Nintendo DS Pokémon games.

Haru's Pokemon Leaf Green Ultimate Ironmon Challenge AAR

ironMon Pokemon Challenge!

Pokemon IronMon Challenge is WAY harder than I thought!

GitHub - besteon/Ironmon-Tracker: A Lua script for the Bizhawk/mGBA emulator compatible with Pokemon Fire Red, Leaf Green, Ruby, Sapphire, and Emerald that tracks relevant data for the IronMon challenge.

Kaizo IRONMON Challenge - Harder than a NUZLOCKE?

PLATINUM KAIZO IRONMON! HARDEST POKEMON CHALLENGE!

THE HUNT IS ON! THE HARDEST POKEMON CHALLENGE (KAIZO IRONMON FIRERED)