Is there a set of game genie codes I can use for practice because I don't want to download a rom of any sorts because I don't want to accedentaly do it illegally

KKKZSPIU YPXXLVGE AEUGNSSL

As far as I know these are the 3 best Game Genie codes to use if you want to practice on console. I don’t know exactly which code is which, but it gives you access to a world select and life counter on the opening screen, (Up/Down to change world on the left, A to add on 5 more lives) gives you a full inventory with the ability to reuse items, as well as letting you re-enter normal stages. Forts, airships, and odd levels like the pyramid are unable to be re-enter after completion, so you’ll have to suicide in the level or reset to get back into them.

From https://narfman0.github.io/angry-sun/pages/notes.html#game-genie-codes ,

Thanks a ton

How does on get a practice rom for an everdrive

You should be able to put in game genie codes on everdrive

Yes this is true but still need the rom for everdrive

He has a github link in his comment