For those wanting to play around with it. It's not perfect, but for anyone wanting to contribute, you can.

https://cdn.discordapp.com/attachments/571368948461862948/758376690237440111/Sup...

There should be some FCEUMM save state files, but I can't guarantee they'll work since I've been informed there's multiple versions of the game.

Edit: Updated 3DSEN profile here.

2nd Edit: Updated again: Second update here.

3rd Edit: Made it to the Final Zone. Still skipped World 5-3 and all of World 6. It really can use more polish in regards to things such as logs, waterfalls, and ladders. If you want more Warts in your Super Mario Bros. 2 USA profile, you can get it here. Still not finished, though.

4th Edit: Scroll down for the latest version and save states for all 7 worlds.

5th Edit: I don't think I can go much farther with this, but maybe someone else can use what I've provided to make progress I where couldn't.

6th Edit: World 5-3 boss added and some tweaks were made to Toad's sprites. I've also added a checkerboard pattern in some areas. Hope you enjoy it.

7th Edit: Made adjustments to more climbing sprites. Here's that version. Enjoy.

8th Edit: Knock out animation for the World 5-3 boss finished. Save states are a wonderful thing. Here's the link for the latest update.

IIRC, the version you were using is the PRG1 variant of SMB2 US from my testing.

Yeah. I managed to reach world 7, but still warped past 3-2, 5-3, and world 6 as a whole. I'll update the 3DSEN profile when I get the chance. Haven't gone through those worlds, but a few updates were added anyway to it.

Updated again with a bit of the Final Zone added. Still haven't defeated Wart yet so the animation is lacking.

I think I'm going to take a break from this. Save states for all 7 worlds with the 3DSEN profile is here. It could use a little more work and some polish, but I'm making it available for anyone wanting to carry on.

This might be the final update from me. World 5-3 has wide trees that might too much for 3DSen to handle. I've gotten to the boss of 5-3, but not bothered with it.

September 26, 2020 Super Mario Bros. 2 USA profile and save states.

Okay, made a bit of an update. Some tweaks to Toad were made and I've added the world 5-3 boss to this patch.

Okay, Added a few more tweaks that I hope will help with climbing sprites for Mario and Luigi. I only did this with the climbing sprites because the eyes would get a bit messed up with other sprites as they're separate sub sprites. Climbing sprites aren't facing towards you or side ways, so it won't affect them. Latest patch is here.

Links are dead

Yeah, I think I posted them in the 3DSen Discord some time ago. Discord redid how links were handled since then because some bad actors were using them to spread things they shouldn't be spreading. As a result, if I wanted to give them a more permanent link, I'd have to look through my files to see if I have the old patch. Not sure if it would be better to start over or not as I feel like I wasn't making the kind of progress I was hoping. However, you could check the 3DSen Discord to see if they're still there if you use Discord.