Get the indicated number of stamps to unlock the corresponding bonus:
Low to High mini-game: 1 stamp
Syllable Count mini-game: 2 stamps
Head Count mini-game: 3 stamps
Tips option: 5 stamps
Stamp Designer option: 7 stamps
Hard mode for Head Count mini-game: 9 stamps
Hard mode for Calculations x 100 game: 11 stamps
Triangle Math mini-game: 13 stamps
Time Lapse mini-game: 15 stamps
Hard mode for Triangle Math mini-game: 17 stamps
Voice Calculation mini-game: 19 stamps
Brain Age Check Selection menu
Select a save game slot, then enter the "Daily Training" menu. Hold Select while choosing the "Brain Age Check" option to have the option of selecting the order of the Brain Age Check tests.
Control title screen
At the title screen, say "Glasses glasses" into the microphone and the Doctor will remove his glasses and say something. Say "Doctor" into the microphone at the title screen and the Doctor will laugh or get mad.
Successfully complete three brain challenges in a day and the stamp used to keep track of your progress will get larger.
In the Syllable Count mini-game, one of the possible phrases is "Thank You Mario, but our princess is in another castle.", a reference from the classic Mario games.
During a mini-game when you get walking speed, select the stickman and it will whistle a Mario tune. Try to experiment with Bicycle Speed, Car Speed, Train Speed, If Faster.
More brain games
Change the Nintendo DS system date, then go to "Daily Training". Then, change the date back a day. Note: This is irreversible.
Sudoku Advanced mode
Successfully complete 25 of the Soduku puzzles (20% completion) in Basic and Intermediate mode to unlock the advanced Sudoku puzzles. Alternately, successfully complete an intermediate puzzle with a time less than fifteen minutes.
Top three results
While tapping the "Graph" option on the "Daily Training" menu, hold Select to display the top three results from every Brain Age Check and training to date.