I thought it was established that Item Abuse 3 was the hardest romhack. Not only was it super long, but it also contains about half-a-million pixel perfect tricks you must preform in one sequence.
But one that is totally possible save stateless I'd say would be Kaizo Mario World 2. If not counting any Kaizo romhacks, there's 1F8 and the levels created by Morsel in JUMP... and also the post-game level from A2MT.
!!! YOUR SAMPLES ARE COMING SOON !!!
Want progress on 100 Rooms of Enemies: The Nightmare Edition? Go
here to see.
Are you a
sample porter and wanna help with
100 Rooms of Enemies: The Nightmare Edition? Private Message
me or
Mellonpizza for details. Expect trading "resources" in exchange.
4 more left.
