Kirbys Adventure (Virtual Console) Cheats

Cheat: Five 1-Ups
In Rainbow Resort, level 2, jump or fly up to the ledge above the entrance door. Stand directly over the door, then fly up. You will enter a secret, hidden door. You skip the first three mini-bosses, and after beating the last one (fireball lion), you will enter a secret room with five 1-ups. Enter the door to your right to end the level.