Drill Dozer

Cheats for Drill Dozer on Nintendo Game Boy Advanced (GBA) Cheat Code

Full Gearbox

Use the secret room in the tutorial level to unlock the Full Gearbox. Then at the world selection screen, hold R and press Select. If you entered the code correctly, the Screw Bit will turn yellow.

Hard mode

Get the Proof of Mastery item. Then at the file selection screen, hold L + R and press Start.

Unlock codes for effect codes

Purchase the Hard Drill when it becomes available at the shop. It will allow you to access the secret MaiMai room in the tutorial world. In the room is a four digit combination lock. There are three unlock code levels that each unlock its passwords, as well as the passwords of the previous level(s). First, choose one of the digits and press Start while the drill is inserted to reset the code to 0000. Then, set each of the digits of the unlock code to their correct number in order. When the correct unlock code is entered, the lock will automatically reset. You can continue entering another unlock code, or enter one of the effect codes for the level unlocked, or a lower level. If you leave the room the unlock codes must be re-enterd.

Level 1: Set the third number to 1, first number to 2, fourth number to 3, and second number to 4 in order to display "2413".

Level 2: Set the third number to 8, first number to 6, fourth number to 5, and second number to 3 in order to display "6385".

Level 3: Set the second number to 8, fourth number to 2, first number to 3, third number to 5 in order to display "3852".

Effect codes

The following codes can only be enabled after the corresponding level code (or higher level code) has been entered. There is no required order for the digits to be entered. When a correct code is entered, a chest with the bonus will appear from the purple brick pipe in the secret room.

EffectCode
Standard Wallpaper2403
Frog Pajamas Costume5746
Samurai Wallpaper4089
Rock Star Wallpaper1814
Cute Clothes Costume2094
Drill Dozer Coveralls Costume9025
Sound Stone9434
UFO Wallpaper2059
Thief Threads Costume4181
Police Inspector Costume2458
Full Gearbox7867
Control Center Wallpaper8785
Blue Overalls Costume5854
Nurse Costume2438
Happy Wallpaper5074
Fashionable Skirt Costume2828
Futuristic Style Costume1419
School Student Costume5716
Master Seal7073

The "Master Seal" and "Full Gearbox" unlock key combinations on various screens for extra effects. The "Sound Stone" unlocks the "Music/SFX Player" option at Gearmo's Save menu at the Trailer. To change Jill's costume, highlight her in the trailer and press L or R. The new wallpapers will appear in message borders and the interior of the Red Dozers' trailer.