Successfully complete the game to unlock the Boss Endurance mini-game.
Successfully complete the game to unlock the Cake in the "Collections" menu.
Successfully complete the game with all 120 chests collected to unlock Time Attack mode.
Collect the secret map pieces from all worlds to unlock the tower in the center of the world map. Once inside you can get any Ability Bubble.
The Ghost ability lets you control certain opponents with B. While controlling enemies you can use their attacks with B, jump a lot with A, and destroy them with Select.
The best abilities in the game are U.F.O., Ghost (obtained in World 8), Triple Star (obtained in World 8), Ninja, and Magic (without the scroll). The Hammer ability and the Cutter ability (both with scroll) are also useful.
You can combine certain abilities together to make better ones by dragging them together. The following is a list of the combinations: Fire and Sword, Ice and Sword, Lightning and Sword, Ice and Bomb, Lightning and Bomb.
When combining two items together, keep the stylus held on the touch screen and the items will spin around in circles. Keep your stylus on the touch screen then move it around in circles. The Bubbles will change colors. If you release the items when the Bubbles are red, you will get either the Fire or Sleep ability; if blue, you will get Ice or Sleep; if green you will get Spark, Wave, or Sleep; if white you will get Sword or Cutter; and if yellow/orange you will get Animal or Metal.
When Kirby is about to be damaged by an enemy or object, press Down to duck. Kirby will still take damage, but his copied ability (if he has one) will not be lost and you will not lose a treasure chest to the Squeaks if they are attacking.
Set the system date to the date entered for your birthday in the system settings. After the introduction sequence, a short "Happy Birthday!" message featuring various Kirby characters will appear.
While playing the game, hold L + R + Select + Start to return to the starting menu. This is helpful if you start a file and want to get on another file without turning off the system.
To defeat Meta Knight in World 7, get the Sword Scroll. Have the Sword and Fire/Ice/Thunder in your inventory. Combine the Sword and one of them. This makes it so you have a Fire/Ice/Thunder Sword. The Fire burns grass and enemies, Ice freezes, and Thunder allows you to hit metal on the ground and send jolts of electricity traveling through the room.
You will need the U.F.O. ability and the Lollipop that makes you invincible. To get the U.F.O., go to level 3-4. Go through the level and when you get to the hill where metal people are falling from the sky, go to the opposite side of the mountain and get the "?" in a Bubble. Touch it and it will pick a random power-up. If it is the Lollipop then you are halfway done. Get on the Warp Star. It will take you to a new place. When you get there, suck up one of the fire people if you do not already have it. Go to the very right of the level. To the right of the door, burn the cloud away. Inside is the U.F.O. ability. It is recommended that you do the level again and get a spare. If you do not already have the Lollipop for invincibility, you can mix power-ups until you get one or get the "?" power-up for a random one. This may take some time. Once you get the Lollipop and the U.F.O., go to the Boss level. You will not need the fire or tornado power-up, but take them if desired and mix them. When you reach the Boss, stay in the middle of the screen and shoot power shots at him by holding B. After he dies the first time he will destroy the cloud ground and make another with holes. He is more difficult now because he has an electric shield around him. Use the Lollipop. Keep flying into him or staying directly on him and he will die quickly.
To defeat the World 3 Boss, get a Hi-Jump Kirby. You also may want an Invincibility and Apple Bubble. At first you might lose your power, but do not worry. You will get to battle him again. Keep pressing B. After you defeat him, he will return. If you lost your power, go back to the top of the screen and suck up a Hi-Jump minion. Then, attack him while using your Invincibility Bubble. You should defeat him within in a few minutes.