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.
Control title screen:
Say "Glasses glasses" into the microphone at the title screen. The Doctor will raise his glasses and laugh. [Screenshot]
Say "Doctor" or "Doctor Kawashima" into the microphone at the title screen. The Doctor will laugh or get mad.
If you say something he likes the sound of, he will laugh. However if you say something he does not like he will frown.
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. This option allows you to select the order of the Brain Age Check tests.
Top three results:
Hold Select while tapping the "Graph" option on the "Daily Training" menu. The top three results from every Brain Age Check and training to date will be displayed.
Advanced Sodoku puzzles:
Complete 25 or more of the Soduku puzzles (20%) in Basic and Intermediate modes.
Alternately, complete an intermediate puzzle with a time less than fifteen minutes.
Successfully complete three brain challenges in a day. The stamp used to keep track of your progress will get larger.
Get missed stamps back:
If you have missed days with no stamps, just set the system date back to the day you missed and get the stamp back. Note: He will say that you lost some previous stamp data because time was "moving backwards". When you change it back you will have the data back.
During a mini game when you get walking speed, select the stickman. It will whistle a Mario tune. Try to experiment with Bicycle Speed, Car Speed, Train Speed, If Faster.
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.
More brain games:
Change the Nintendo DS system date, then go to "Daily Training". Then, change the date back a day. The Doctor will say something strange. Note: This is irreversible.
To unlock all mini games, keep moving the date on the DS forward. Get a stamp each day until you unlock everything. When you switch back to the correct date you will lose all the stamps, but everything will still be unlocked.