Full pause screen:
Press Start to pause your game, then press X
+ Y.
Hidden artwork:
Place the game disc in a PC compatible CD-ROM drive
to find artwork in the "extras" folder.
Save pictures from the web:
You can save pictures onto your VMU while using Chu
Chu's Dreamkey browser. Place the cursor over the desired picture
and press X + A on the controller.
Sonic Adventure Chaos:
Finish each of the twenty-five challenge
mode levels to transform the mice into Chaos from Sonic Adventure.
NiGHTS angels:
Finish each of the twenty-five mania
mode levels to transform the mice into angels from NiGHTS.
Hard mode puzzles:
Finish every puzzle in normal mode.
Special mode puzzles:
Finish every puzzle in hard mode.
Mania mode puzzles:
Finish every puzzle in special mode.
Taunt opponents:
Press L or R during the battle games
to taunt your opponent. Hold L or R to choose which
taunt to use. You can also taunt even after you have won at the
congratulations screen.