Brain Age 2: Train Your Brain In Minutes A Day Codes -

Bonuses:
Complete the indicated task to unlock the corresponding bonus.

North American version
Memory Sprint Game: 1 stamp 
Change Maker Game: 2 stamps 
Word Blend Game: 3 stamps 
Access Brain Tips: 5 stamps 
Calendar Count Game: 6 stamps 
Stamp Designer: 8 stamps 
Math Recall Game: 10 stamps 
Choose Songs on Piano Player: 12 stamps 
Clock Spin Game: 16 stamps 
Piano Player Hard Mode: 18 stamps 
Sign Finder Hard Mode: 20 stamps 
Block Count Game: 22 stamps 
Math Recall Hard Mode: 24 stamps 
Block Count Hard Mode: 26 stamps 

International versions:
Block Count (Hard difficulty): Get 26 stamps. 
Calculate The Height (Hard difficulty): Attain a perfect 5/5 score. 
Calculate The Height: Get 22 stamps. 
Correct Change: Get 1 stamp. 
Days And Time: Get 6 stamps. 
Determine The Time: Get 16 stamps. 
Finish Position: Get 10 stamps. 
Masterpiece Recital (Hard difficulty): Attain a perfect 100 score. 
Memory Addition (Hard difficulty): Get 24 stamps or have a time under 40 seconds. 
Memory Addition: Get 3 stamps.. 
Missing Symbols (Hard difficulty): Get 20 stamps. 
Select Song Masterpiece Recital: Get 14 stamps. 
Sign Finder (Hard difficulty): Attain a time of 17 seconds or less. 
Stamp Designer: Get 8 stamps. 
Sudoku (Advanced difficulty): Solve any Intermediate level puzzle in less than 15 minutes. 
Tips Option: Get 5 stamps. 
Word Blend (Hard difficulty): Get 12 stamps or score 100 points. 
World Blend: Get 2 stamps. 

Control title screen:
Say the following phrases at the title screen to change the Doctor's expression.

Say "Cilantro" and he will make a unhappy face. 
Say "Pickled plum" and he will make a sour face. 
Say "Brain Age Two" to make his head swell. 
Say "Doctor" to make him laugh. 
Say "Glasses, Glasses" to send his glasses flying in the air. 

Play any Brain Age Check exercise:
Choose your profile and go to the options menu with the "Brain Age Check", "Daily Training", etc. options. Hold Select and choose "Brain Age Check". You can now play any Brain Age Check exercise.

See top three exercises and evaluations:
Hold Select then choose "Graph" to see the top three of each exercise and evaluation.

Virus Buster mini-game:
Select the "Training" option at the "Personal" main menu. Scroll to the bottom of the list and select the last "???" option. the Virus Buster mini-game is a variation of Dr. Mario.

Unlocking training modes:
Choose one of the training modes at the menu. Get your stamp for the day then turn off the Nintendo DS. Turn on the Nintendo DS and change the date to the next day. Turn off the Nintendo DS so that your changes can be saved. Keep repeating this until you unlock all the training modes. When you have unlocked them all, turn off the Nintendo DS and change the date back to the correct value. This may effect your graph but you will still have all of the training modes unlocked.

Animation sounds:
After every training exercise, click on the animation that corresponds with your speed (for example, walking, bicycle, car, etc.) to hear a cute sound effect that goes with it. The walker whistles, the car beeps, the train honks, etc.