You can access this training program at any time. Select "Training" on the personal main menu. Scroll down to the bottom and click on the last "???". This will open the "Virus Buster" mini-game. It is basically "Dr. Mario," but with a mellowed out soundtrack and touch controls.

Select your player profile and head to the options screen (which contains Brain Age Check, Daily Training, et cetera). Hold down the select button and go to Brain Age Check. If you do it properly, you should be able to play any game offered in Brain Age Check. This cheat will therefore allow you to practice on all tests, furthering your skills. (unverified)

You can earn a Stamp everyday. You get a Stamp by completing any training game, and will get a new game to play after obtaining a new Stamp.

You can get extra Stamps, used to unlock things in the game, by turning the game on during different days. If you manipulate the DS' internal calendar, advancing it by a day and then turning the game on, you'll get a Stamp. Keep doing this over and over again until enough Stamps are earned that you have unlocked everything.

Keep in mind that when you set the calendar back to the normal day, earned Stamps from days that have not yet elapsed will be removed. Therefore, you must spend these Stamps before changing the calendar back to normal. While Stamps will be lost, things unlocked won't be.

Here's a cool hint to choose which minigames you play during Brain Age Check. Simply hold the Select button down while selecting the Brain Age Check option, and you'll get to chose which training modes you perform. This allows you to dodge any exercises which you don't particularly care for.

At the game's main menu, say the following words on the left into the DS microphone to make Kawashima react in the corresponding way on the right.

• "Coriander, Coriander" - Dr. Kawashima gets angry
• "Dr. Kawashima" - Dr. Kawashima laughs
• "Glasses, Glasses" - Kawashima's glasses fly in the air
• "Pickled Plums, Pickled Plums" - Dr. Kawashima makes a disgusted face

Correction by FranR