At the title screen, you will see Mario dancing. Press Up on the D-Pad to make him dance faster, and Down to make him go slower.
Change the speed of the 'face-in-face' sequence
On the View menu, hold Up on the D-Pad to speed up the animation of the face-in-face sequence; hold Down to slow it down.
Control scratching length in DJ mode
Instead of just tapping A when you want to add your custom sound effect when mixing beats in DJ mode, hold A and your character will continue to scratch the record (without sound) until you let go.
Erase All Memory
Before turning on the GB with the GB Camera, hold Start and Select. Turn on the game while holding those buttons, and it will prompt you to erase your game. Hit A to choose yes, or B for no. To delete all photos, enter the Animation Album menu, select the delete setting, then hold Select, Start and press Up to delete all photos. Press A to confirm or B to cancel.
Hidden DJ song
There is a hidden "London Bridge" song that plays if you set the SE to 9 and press A button repeatedly.
Make stamps go the opposite direction
Hold the A button while a stamp is selected to flip the stamp the other way.
Printing Music
After penning music using D.J. mode, composers can print a transcription via the Game Boy Printer. Access the Sound 1 screen, then print by pressing and holding Start and A.
Raise the flag in 'Run! Run! Run!'
When you win in the 'Run! Run! Run!' minigame, tap A as fast as you can to raise the flag next to the podium.
Secret slide show options
At the slide show menu (where it has those 2 faces spinning around and around) press the Select button. You'll see the letters 'BGM' at the top, and the word 'shuffle' on the bottom. Press Up to choose BGM which allows you to make the music while viewing the slide show classic or P.Voice, or press Down to shuffle the pictures while viewing the slide show so they're not in order. To get out of this, just press Select again.
