Chu Chu Rocket!

Full pause screen:
Press Start to pause game play, then press X + Y.

Hidden artwork:
Place the game disc in a PC compatible CD-ROM drive to find artwork in the "extras" folder.

Dreamkey web browser:
This trick requires a Dreamcast keyboard, and can be used as a replacement for the standard Planetweb browser. Go to the Homepage in the main menu. Once the Chu Chu Rocket title appears, press [Ctrl] + O on the keyboard. The URL bar will appear, which allows you to type in any Internet address. This is same browser that the Europeans and Japanese Dreamcast owners have access to.
Information in this section was contributed by Haneef Majeed.

Some advantages of the Dreamkey Browser include
Better list interface and has arrow bars, which makes it appear closer to a computer web browser.
Supports Flash 3.
Better Javascript than the Planetweb browser.
Ability to send and receive email with VMU files attached.
Higher on-screen color count than Planetweb browser.
Can Save Midi or Wav files to the VMU.
Pages appear to load faster.
Supports cookies.

Keyboard shortcuts
URL bar: [Ctrl] + O
Reload page: [Ctrl] + R
Bookmarks: [Ctrl] + B
Mail: [Ctrl] + M
History: [Ctrl] + H

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.
Information in this section was contributed by Andym216.

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

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

Hard mode puzzles:
Successfully complete all puzzles in normal mode.
Information in this section was contributed by smith99.

Special mode puzzles:
Successfully complete all puzzles in hard mode.
Information in this section was contributed by smith99.

Mania mode puzzles:
Successfully complete all puzzles in special mode.
Information in this section was contributed by smith99.

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.
Information in this section was contributed by Stone Cold.

Hint: Arrow placement:
Remember that letters run across the top and numbers run across the side.
Information in this section was contributed by Rahaining.

Normal mode
Up on B-2
Down on H-1
Right on K-2
Down on H-2 Left on H-3

Up on F-9
Left on D-2
Up on C-9
Left on B-9
Left on E-2 Left on I-2

Up on J-8
Right on F-9 Left on G-1

Up on E-9
Left on L-2 Down on I-1
Up on H-9

Down on I-1
Left on F-2 Left on G-7

Left on L-4
Left on C-6 Left on G-2

Up on G-5
Down on D-1 Right on F-6

Down on G-4 Up on K-3

Up on C-7 Left on C-6
Down on B-1

Down on B-1 Down on I-2

Down on E-5
Right on I-4 Up on G-5

Up on F-5 Right on J-8

Hard mode
Right on D-8 Right on F-8
Right on G-8
Down on I-8

Right on C-5
Right on A-7 Right on C-7

Right on A-9
Up on B-6
Down on E-5 Right on G-6

Up on F-8
Down on K-3 Up on K-6

Down on A-2 Right on A-5
Left on L-5
Up on K-9

Up on G-5
Down on K-1
Right on D-3 Left on K-8

Up on C-5 Up on J-5

Right on A-3 Down on K-1

Up on F-6
Down on G-4 Left on B-2

Down on H-1 Left on L-7
Right on A-4

Up on I-5 Down on D-5

Down on D-3 Right on A-8

Up on A-9 Right on B-9

Down on E-2 Up on F-9

Right on G-3 Left on L-5

Left on C-3 Up on C-5
Left on F-1
Left on F-7
Down on I-7
Down on K-1

Up on D-6 Down on I-4

Left on L-5 Down on K-1

Up on D-6 Down on I-4

Hint: Move control display:
Go to "Puzzle Edit" and complete a puzzle. Then, go to "File" and press Y. The control display at the bottom of the screen can be moved left or right with the D-pad.
Information in this section was contributed by Rob.