hey there! i'm new to super mario bros all stars and wanted to know if there are known cheat codes for the game to make practicing easier like: infinite lifes, start on level/world yxz.

There is a practice rom but I’m not sure where to get it lol I wasn’t expecting you here LUL

If you're talking about Game Genie codes a quick search gave me this: https://etherealgames.com/snes/s/super-mario-all-stars/game-genie-codes/

Unless there's a very recent development, there is no practice ROM for any of the All-Stars games with the exception of SMB3.

I think I messaged you on discord this, but what I do is:

• play the game all the way through with really safe strats, and with collecting all the 1-ups in each of the levels
• save and quit once I beat the game
• repeat until i get sufficient amount of lives to practice (the file I use has around 80 lives but you don't need nearly that many)
• use dpad to use world select on the game selection screen (if I'm practicing warpless or fire any% I will start at world 4 and get both powerups and the 1-up, but if I'm practicing regular any% I just start at world 8 )

edit: edited post because 8) is an emote apparently

I don't think this falls under the "codes" category, but there is hardware that you can use on console like the Nakitek and SD2SNES for use of savestates. Super Everdrive doesn't support savestates unfortunately, but just in case you can't find a practice ROM there's the two hardware options I listed that you can at least check out with just creating/using savestates.