SMW TRUE 8-bit tileset & NSMB style SMB tileset

[MaxiGamer™]

There is actually a Super Mario World pirate game for the NES. Spriters resource has even the playable characters and enemy sheets for it.

Maybe you want to play it for some tileset inspirations.

What a Holy Jolly Golly great idea!
I'll give the game a try (if I can find the ROM) and take a look at the sprites sheets!