Ball ability
The Ball ability may seem useless at first glance, as it is only a form of moving around a level. However, while Kirby is flashing as a ball, he is invincible and does a ludicrous amount of damage to enemies in his path. This makes it possible to destroy King Dedede in five hits. However, you will be vulnerable momentarily when you hit the ground. Jump into Bosses at such an angle that you will not land "inside" them.
Laser ability
Long distances are your friend. If you keep hurting yourself with Ball, give Laser a try. It may be weak on Bosses, but as long as you stay as far away as possible, they cannot harm you. If you want slightly more muscle at the expense of range, try Cutter.
UFO ability
Hold [B] button for five to ten seconds, which will make double star (similar to when you suck in two enemies). It will send the star that will eliminate all enemies in its path until the end of the screen.
You will not be able to keep a UFO ability in any of the stages of where you can copy it by the time you finish it (go through the big star door). Nonetheless, if you swallow two enemies that have abilities, UFO will not be listed as one of them during the roulette. If there is, it is a rare chance of stopping the roulette on it.
The UFO ability is in the roulette. If you let the roulette stop on its own in certain areas it will always be the same.
If you have the UFO ability, you will have a variety of attacks to choose from:
Press B normally: Blue Beam ability
Hold B two seconds: Blue Laser ability
Hold B five seconds: Powerful Blue Laser ability
Hold B eight seconds (Kirby flashes): Very powerful Blue Laser ability
When you see two stones, suck them up and let the roulette pick your power. You will get UFO.
Museum trick
If you you have unlocked all the stages in a level, try to defeat the Boss. Go to the museum and swallow any enemy if you do not have an ability yet. Remember to only jump once; jumping twice will cause Kirby to pop the enemy, then you will have to leave and return again. Go to the Boss level, and when you enter, press [Select] to throw away the ability. However, try to make it hit The boss. They will get some damage, making it easier to defeat them.
Defeating the Dark Wizard
When fighting the last Boss, the Dark Wizard, repeatedly press [A] to jump and the wand will spin around you. This will act like a shield. You can still shoot while pressing [A] if you also press [B].
To defeat the Dark Wizard easily, stay in the far left corner. When you see the white tornado, jump and press [B]. This damages him more, and protects you from most of his attacks.
Defeating Heavy Mole
If you are facing Heavy Mole, beware when trying to copy the bullet. Sometimes it gives you a Sleep power instead of a Hammer.
When fighting Heavy Mole, red missiles will put you to sleep and brown missiles will give you the hammer ability.
Defeating King DeDeDe
To defeat King DeDeDe easily, get the Hurricane move and keep going back and forth hitting him. If you keep moving in that way, he probably will not hit you. After defeating King DeDeDe, you have to fight a moon-type thing. To defeat it, stay in the middle on the left side of the screen and only move when necessary. Most of its attacks will miss. Then, use your Starwand and shoot stars at it rapidly.
Go back to level 5 and suck up a bomb then eat it to get its power. Then, fly over the rest to avoid damage. Next, go through the door at the end of the screen. Then use your power on the giant wheel. Then the wheel should charge you. Jump over it and it should fall over and a mini wheel will appear. Suck up the tire (do not eat it), then spit it at the wheel and it should die. Suck up the wheel and eat it to get its power. Then, press [Start] and select "Exit through a door". Then, fight King DeDeDe and just go back and forth using the wheel. Note: Try pushing [B] immediately before you hit the side of the screen.
Before going through the Boss door to fight king DeDeDe, go to level 5. Go a little way and inhale the spinning top to become Tornado Kirby. Then, return to the map and challenge king DeDeDe. Keep using the Tornado ability to defeat him. He cannot hurt you as long as you continuously press [B].
When you are facing King DeDeDe, you can defeat him easily with five to ten hits using the copy ability High-Jump.
To defeat King DeDeDe, get Laser Kirby and just blast and jump.
To defeat King DeDeDe, use either the Tornado, Ball, or UFO abilities.
Use Rock to defeat King DeDeDe.
Use the following trick to use Crash Ability on King DeDeDe: To do this trick, you must have the Boss room available with King DeDeDe. Go to level 1 (Vegetable Valley), and go to the second room. Defeat Poppy Bros. Sr. and swallow him. He is the one with the bombs. Once you defeat him, press [Start] without using the Crash Ability. Select the "Leave Through A Door" option and try to win every sub-game possible while you go back to Rainbow Resort. Also, try to get first place in each one to get lots of lives. When you get back to Rainbow Resort, go to the Boss Room. When you first enter, use the Crash Ability. It will help greatly.
To defeat King DeDeDe, use Spark. It does the most damage.
Just use ball and keep on bouncing and hitting him several times you defeat him. Note Make sure not to hit his hammer.
Defeating Tornado Magician
When facing the Tornado Magician, stay in the bottom left corner. You will only get about 2 damage from him if you are skilled. You can deliver a lot of damage when you are barely even moving.
Defeating Wispy Woods
Get either Sword/Spark/Fire/Freeze/Ice Kirby, then stay close to him. He will not attack you there. Keep attacking him and he will soon be defeated.
Note: You can also use Needle.
Make sure you have and keep Needle (or Spark) Kirby. When your fight with the Boss begins, run directly under him and hold [Attack]. If you are lucky, he will not be able to attack you.
Wispy Woods: Avoid air puffs and shoot dropped apples.
Paint Roller: Inhale the cloud and use Shock Kirby.
Mr. Sun and Mr. Bright: Use Shock ability from last battle.
Kracko: Race to top as High Jump Kirby and jump at Boss.
Heavy Mole: Inhale missile and hit Boss with hammer.
Meta-Night: Avoid long range attack; jump and hit.
King DeDeDe: When he jumps, hit him with Sword Spin.
See Meta-Knight's face
Defeat Meta-Knight, then quickly hit him. You should see his face. It should look like Kirby's face, only blue.
Level 1: UFO
Get to the point where there is a waterfall with rocks. You may notice that there is a black hole under the first rock. It is really a door. Go under the first rock, but do not fall down too far or you will die. Inside will be a UFO.
Level 1-1: Get Throw
Enter the first level. Jump over the first beam that you see. There will be another beam coming toward you. When it is almost to you, suck it up along with the one coming after it. You need to suck them both up in the same breath. Press [Down] to get your power. Do not press any buttons to select a power while it is spinning. When it stops spinning, you should have "Throw". Note: If you accidentally kill the first beam, go to the right until you can no longer see where beam one was standing. Then, return to where you started and the first beam should return.
Level 7-2: Extra lives
In level 7-2 (Rainbow Resort stage 2) in the first room, fly onto the ledge exactly over the door. Fly straight up to the top of the screen and you should see a black rectangle covered in vertical lines. Fly in front of it and press [Up] as if it was a door (and it is). Once inside, you should have skipped a some Bosses and be at Bonkers the monkey. After defeating the Fire Lion, you will enter a room with five extra lives.
Level 7-6: Hidden room
Go to the room with the final door that ends the level. Do not go through it. Just a little higher than the door you will see a moon. Go up to it and press [Up] to enter the hidden room.
Easy lives
Seeing in dark areas
When in the dark areas (where enemies are nearly, if not completely impossible to see), look for ghosts. If you find one, copy its ability (Light) and use it. If you cannot find a ghost, tilt the screen away from you for a similar effect.