Do you have a video example? I'd suggest using tools like a wrong warp practice rom to verify your setup is correct. Then we can rule out the most common way of crashing, which is incorrect memoery values. That said, even pixel perfect, we've seen some crashes. Checking a video we can point out where, and playing the practice rom can empower you to figure it out.

Ping me if you get a board up, I'd probably submit a run. I did a couple with a patch and it was so much faster :)

Naively, I'd initially route like hundo but pwing from 7-9 on 5-9 🤷

There exists a subpixel manipulation to set up 7-1. After you kill Lemmy (world 6 airship), there is some time before the wand grab. Position yourself under the wand and come to a stop. Tap right as briefly as possible. If Mario does not move right a pixel, keep pressing single frame inputs to the right. If Mario moves a pixel, stop and wait for wand. When Mario doesn't move, the subpixel is incrementing higher. We want a low subpixel value though, so when he does move the single pixel, this means the subpixel is very low with only whatever remainder is left after incrementing Mario's x position.

Noted here: https://narfman0.github.io/angry-sun/pages/notes.html#7-1-subpixel-manipulation fwiw

Never heard of that one, points for obscurity.

The other 3 categories say "Banned emulators: ZSNES (any version), SNES9x 1.4x". Since FCEU is not explicitly mentioned, and the smb3 folks are pretty chill anyways, you should be safe.

If you do anything to obviously expose some difference , the run would probably not be accepted and the emulator likely banned. I am quite sure the reviewer would notice :)

Good luck, hands have mercy!

Cool - after testing, I did replace my patch with one I made from randomizer. I'd like to revisit 5-9 (though it is a weird one as you say) and maybe patch title screen differently, but it's 95% there IMO.

Cool, I just made a patch myself too: https://github.com/narfman0/romhacks/raw/master/Super%20Mario%20Bros%203%20noauto.ips

I haven't tested it at all... I wonder what "some" autoscrollers are and why some can't. I'm guessing some break the game. I'll have to see the difference :)

IMO this is a great idea for 100%! I'm noting this to look into for a later date :). We need the rom first, then we can have a few runs, and if there are enough runs we can ask category extensions mods to make it a category formally.