Chaos in the puzzle...
	Hard mode puzzles...
	Mania mode puzzles...
	NiGHTS angels...
	Save pictures from the web...
	Sonic Adventure Chaos...
	Special mode puzzles...
	Taunt opponents...
	Try out the Dreamkey Beta Brow...

Finish all 25 puzzles in stage challenge mode to have a Chao from Sonic Adventure replace the Chu-Chus.

Successfully complete all puzzles in normal mode.

Successfully complete all puzzles in special mode.

Successfully complete each of the twenty-five mania mode levels to transform the mice into angels from NiGHTS.

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.

Successfully complete each of the twenty-five challenge mode levels to transform the mice into Chaos from Sonic Adventure.

Successfully complete all puzzles in hard mode.

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.

The beta of the new browser, Dreamkey, is used to view the Chu Chu Rocket webpage! Just go onto any page on the Chu Chu Rocket webpage and push Ctrl+O on your keyboard. A jump-to a window will appear and you may type in an address to view. This will only work if you have a Dreamcast keyboard, though.