Instructions
Grab the fire balls as the dragon shoots them at you by pressing the "1" button. Press the button when each fire ball is right in front of you; not as soon as it leaves the dragon's mouth. If you try to grab a fire ball too early or too late, you will miss it and it will hit you.
Throw the fire ball back at the dragon by pressing the "1" button once more while you are holding the fire ball. If done successfully, the fire ball will strike the dragon and a large number of beads will appear.
Collect the beads by running over them and touching them with Kirby's body. You do not need to press a button to pick up the beads; Kirby picks them up automatically.
Repeat this process until the dragon is defeated. Once you collect enough beads, the secret level is unlocked and can immediately be played.