All Working Wario Land 4 Cheats - GBA

Super hard difficulty setting
Successfully complete the game under the hard difficulty setting. Start a new game, and the super hard difficulty setting can now been selected.

Wario Karaoke
Enter the sound room and highlight the "Exit" option. Press [Select] + [Start] + [R] + [L] + [Up] to unlock Wario Karaoke. Alternately, get gold crowns by collecting over 10,000 coins in all levels to unlock the Wario Karaoke (music test) option.

Crowns
At the end of every level the CPU will add your score and award a crown for the following number of points.

100,000: Gold crown
10,00: Silver crown
5,000: Bronze crown

Item shop items

Game 1 (Baseball): 1 medal per 3 points.
Game 2 (Wario Hop): 1 medal per 15 points.
Game 3 (Roulette): 1 medal per complete body.

Bosses

Puffy Wario: Get stung by a wasp
Bouncy Wario: Get hit by a hammer
Fat Wario: Eat the bear's apples
Vampire Bat Wario: Touch a bat
Snowball Wario: Get hit by falling snow
Zombie Wario: Shot by a ghost
Frozen Wario: Get hit by a shot of ice from the monkeys
Flat Wario: Flattened by moving machinery
Bubble Wario: Get caught by a floating bubble.

Defeating Aerodent
Jump on the heads of the falling opponents with spikes on their bottoms. They will crouch up into a ball. Pick them up, and toss them so the spike hits the bear's butt. The bear will deflate. When his feet are blinking, tackle him from the side of his foot. He will turn over. The mouse will then pop out of the bear's head. Tackle him from the side of his head. Repeat this until he is defeated. Note :If you are an advanced player, try tackling the mouse two times each turn.

Defeating Cuckoo Condor
When you get to Cuckoo Condor, stop by the Item Shop and pick up the Big Fist. When the Big Fist is used, Cuckoo Condor should have just a little life remaining. When he shoots the shock wave or the saw, jump over them and stand under the claw for a split-second, then run away. The claw will reach down, trying to grab you. When it reaches down, hit it. It will swing up and hit him in the head. When the bird breaks out of the clock, it will shoot eggs. If you catch one, hold it. When they break, small ducks will appear. Do not touch the ducks -- they will hurt you. Keep the egg and when the bird returns (he has to face you), jump up and hit him on the top of his head with the egg.

Defeating Cractus
When you collect all the stones, go through the door that takes you there. Instead of fighting Cractus, go to the Item Shop. If you have enough medals, get the Big Fist. After you use the Big Fist, climb up on the ladder that is hanging on the wall. When Cractus appears, if he is not drooling, jump up off the ladder and down-pound ([Jump] then [Down]) on his head. Continue until he is defeated.

Get ten or more Froggy Coins and choose the Black Dragon. It should leave him with 2 HP. When he is chainsawing you with his leaves, go on the ladders and do a Butt Slam on him. Repeat this two times. Note: The Froggy Coins are obtained in the bonus games and not the levels.

Defeating Golden Diva
When the battle starts, her face will duplicate four times. They will rotate around the fan she is holding to cover her true face. Then, one will become brighter and break from the rotation. Jump on it. It will fall to the floor, changing the face and turning silver. Do an upper charge throw by holding [Up] + [B] until Wario flashes. When the fan gets close to you, release [B], then [Up]. Do this several times until the fan breaks. She will then drop small green ball-like creatures. Jump on their heads and do a regular throw by simply jumping, holding [Up] and pressing [B]. She will then drop a large blue ball with a bear on it. When you tackle it, the ball will go diagonally up from the direction you tackle it. When the timing is correct, tackle it and make it hit her face. She will now start laying black spotted eggs. Catch one, then hurry and do a regular throw to her face before it explodes. She will now throw a spiky hammer. Let it drop. When the spikes disappear, grab the hammer. Do not throw it at her. Instead, throw it lightly in the air, staying on the ground. Let it hit you on the head. You will become Springy Wario. Press [A] at the correct moment to bounce upward and hit her face. Repeat this until her face becomes red. Hit her about three more times and her face will stretch upward and she will start butt-slamming the ground. When she does, jump out of the way and tackle her face from the side. Repeat about three more times and she will be defeated.

Change enemy's color
In every level there are ninja-looking enemies with spears. Pound the ground and they will change colors (red, yellow and blue). You can also do this to harmless enemies.

Faster music
Press [Down] on a hill and the music will go faster.

Hall Of Hieroglyphs: Easy money
To get more money to spend on mini-games, play the Hall Of Hieroglyphs level and collect every coin, defeat every enemy, and get every diamond.

Palm Tree Paradise: Purple tube diamond
To claim the diamond in the purple tube, knock out the scientist then pick him up. Throw him on to the switch to activate the steps by holding [Up] + [B]. When he flashes, release the buttons. Then, climb the steps and grab the diamond.

Pinball Zone: Easy coins
Note: this secret only works in pinball zone. Go to the gorilla with the bone on the left side. Turn your back to him and press [B]x2, which allows you to ram. You will find 10 cent coins in the first two blocks.

Hidden passage
On level 2 in the diamond world, go to the top of the screen on the very left of the level. There is a hidden passage that leads to the key.