Brain Age Express: Math Cheats

Challenge Mode
Get a Brain Age score of 20.

Unlockable Games and Modes
You can get 1 stamp every day for doing a training minigame. Note that to play Virus Buster, you must have earned a stamp for that day.

Battle Mode for Sum Totaled Minigame Get 5 Stamps
By the Numbers Minigame Get 1 Stamp
Calculations X 100 Hard Mode Get 23 Stamps
Change Maker Minigame Get 10 Stamps
Change Pin Tip Mode Get 17 Stamps
Comment Settings Get 15 Stamps
Multi Tasker Hard Mode Get 30 Stamps
Multi Tasker Minigame Get 25 Stamps
Slideshow Mode Complete any 3 Themes
Stamp Design Mode Get 3 Stamps
Tips Mode Get 7 Stamps
Triangle Math Hard Mode Get 28 Stamps
Triangle Minigame Get 20 Stamps
Virus Buster Minigame Get 12 Stamps

Make Ruyta Kawashima's Head Triplicate
When you're in the Main Menu of the game, speak to Ryuta through the Microphone of your DS and say "Brain" "Age" "Express" in that same order. When you say the three words right he'll get surprised and his head will triplicate.