Change the speed of Dancing Mario
At the title screen you will see Mario dancing Press Up on the DPad to make him dance faster and Down to make him go slower
Change the speed of the faceinface sequence
On the View menu hold Up on the DPad to speed up the animation of the faceinface 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
Printing Music
After penning music using DJ 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