Custom title screen sound:
At the title screen, hold Down + Y and record any sound into the microphone. The recorded clip will play during the introduction music. To preview it, press Down + X at the title screen. To hear it slower, press Down/Left + X and to hear it faster, press Down/Right + X at the title screen.
Birthday greeting:
The girl will greet you by saying "Happy Birthday" at the main menu on the date that you entered as your birthday in the system settings.
Holiday greetings:
Set the system date to December 25, January 1, and other holidays to hear a new greeting.
Girl without top:
Enter the DS system language option and change it to "Japanese". The girl on the menu screen will no longer have her top. Alternately, successfully complete the game on the hell difficulty setting.
Opening sounds:
Touch the girl in various places at the mode selection screen and she will scream.
Credits sounds:
During the credits, touch the Sega logo to hear the classic "Sega" sound. Touch the other text and images that appear to hear other sounds. After the credits and theme song ends, touch the person sleeping in the audience to hear him snore.
Alternate girl costumes:
Find all the hidden rabbits to change the girl costumes.
Body 2 and 3:
Successfully complete story mode on the normal difficulty setting to unlock Body 2 and 3.
Sound test:
Successfully complete story mode on the normal difficulty setting to unlock the sound test option.
Hard difficulty:
Successfully complete story mode on the normal difficulty setting to unlock the hard difficulty setting.
Hell difficulty:
Successfully complete story mode on the hard difficulty setting to unlock the hell difficulty setting..
Carts level:
Look on the top screen to see which lane the person is flying down. Then, pay close attention and firmly stroke a straight line down the path the man in the cart will soon come through. Every spike-ball will move just enough for the cart to get by. This level is otherwise nearly impossible to complete.
Defeating Plants Boss:
Go to the right-hand or left-hand corner of the level and remain there patiently. Eventually a vine will come down inches away from you, but not quite hitting you. Just burn it and go back to the corner. Needless to say, you should be as close to it as possible. The vines cannot hit you if you are tucked in a corner well enough. Eventually you will begin throwing your stakes of fire into the creature's mouth. As for this part, do them one at a time if needed. It is better than losing one third of your health just from hitting his teeth once.
