What are all the cheats for Kirby and the amazing mirror?

In "Kirby and the Amazing Mirror," players can use several cheats to enhance their experience. One popular cheat is the ability to unlock all copy abilities by entering the code "L, R, L, R, L, R" on the title screen. Additionally, players can access the sound test by holding the L and R buttons while selecting "Options." For extra lives, players can collect the hidden 1-Up items scattered throughout the game.