https://nsmbhd.net/thread/2611-full-nes-remake-tilesets/

https://nsmbhd.net/thread/2706-super-mario-bros-tile-remakes/

Please. I am Planning on a hack that starts with SMB1's first world, then SMB3 1-2 out of nowhere, cuz why not, then a mishmash of levels remixed from their originals. All I need is an easy way to use these.

Xdelta? That's a patch format, noting really an importable tileset format.
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Nothing to say, so jadnjkfmnjamnfjkldnajfnjkanfjdksan jsdnvj m.