Walkthrough
After completing Donut Dome, you will then proceed to Honey Hill. Honey Hill is a grassland, a forest area found near a great body of Water, that features an obstacle that includes giant rolling balls of Waddle Dees. It is here that Kirby will have his first chance at capturing the Yo-Yo Copy Ability. You will need at least a second character to help you defeat this level, as well as three extra characters in order to obtain the Rainbow Puzzle Piece of Honey Hill.
Right after starting the level, there will be a Hidden Door (though not really all that hidden). It is here where you will first obtain the Yo-Yo Copy Ability. After obtaining it, catch it on Fire. Once you have, throw the Yo-Yo at the wall to the right to catch the rope on fire. After you do, quickly jump inside the cannon before the rope burns out, allowing you to blast off and find some extra Items.
After eventually reaching and heading through the second door of Honey Hill, you should quickly spot another cannon. Do as before with lighting your Yo-Yo on Fire, jumping in the cannon after you light the fuse. This will bring you to another Hidden Door. Once inside, head over to the right and grab the key, allowing you to open the locked door in this area. Within this locked door is the next Hidden Switch, the same that will grant you access to the additional level of Extra Eclair.
Near The End of Honey Hill will be four cannons, one for each of the characters you should have by this point in the game. After lighting the fuses with your flaming Yo-Yo (like before) hop into the cannons with all of your characters. While in the air after blasting off, you will obtain the Rainbow Puzzle Piece for this level. The final door that proceeds to the next level will be found shortly after this.
Copy Abilities
Bronto Burt, Burning Leo, Gim, Nruff, Waddle Dee, Wester