[quote name='frpilot']it never was a problem to me with super mario all stars or super mario world and the super nintendo controller has nearly identical button layout as the 3ds. i probably got used to the the slanted button layout since almost every console i can think of in the past decade is like that (ps1, ps2, ps3, xbox, snes, n64, etc)
i think it's more annoying when the buttons aren't slanted like playing new super mario bros on a wii controller.[/QUOTE]
Super Mario World uses B to jump and Y to run, with A being the spin jump. Super Mario All-Stars did this by default as well, although you could re-map them if you chose. The NES games use A and B, since those were the button names on the NES. Holding Y to run and B to jump feels much more natural, and I wish that was an option in these games.