Extra Arena in Powerstone Demo
Remember the arena you can play in one-player mode but is normally unaccessible in two-player? Simple. When you play a two-player game, at the end of the match, hold all four action buttons and press start to return to the title screen. Then go back to 2 Player mode and have someone pick Gunrock as a character. Now when the stage select screen pops up, Voldo should be accessible right away, BUT DO NOT MOVE THE CONTROLLER EXCEPT TO PRESS A! Or else you will move to the normal 2 arenas and can't pick the hidden one

Foggy weather for Flag to Flag racing
On the choose transmission option screen hold L,R and up on the dialog pad. Pick your transmission with the a button still holding L,R and up on the dialog pad. Hold it till you see your car starting up. Ta-da, you have foggy weather

Music Test
Press A B X Y and start on the starting screen and you will go to the music panel. Press play on the music panel and you will hear music from the games

R2R Rumble Gloves
In the demo of ready 2 rumble boxing, there is a way to get RUMBLE GLOVES. What you do is first hit your opponent enough so at the bottom the word rumble is spelled out. Now on the controller push the two top trigger buttons at the same time and your gloves will turn white and the guy will yell RUMBLEEEEEEEEEEE

Rain in Champ Car Racing Cemo
On the Transmission Select screen, hold L+R+Down on the D-pad, choose your transmission, continue to hold until game starts for rainy weather

Replay Bass Fishing
After your two minutes are up and the screen that says GAME OVER comes up, hold A B X Y and hit START and you'll hear a sound and see the loading screen with the little frog thing showing the trick has worked. The game will restart and you'll be able to play again. Now you don't have to go all the way back to the menu

Replay Power Stone
If you win or lose while playing Power Stone, just press all 4 action buttons at the same time and then start. This will bring you to the beginning screen of Power Stone instead of the Generator Disc Menu

Sonic Adventure Secret Chao Puzzle Game
Plug two controllers into your Dreamcast, controller ONE in port A and controller TWO in port D. Insert a VMU into controller TWO and load Sonic Adventure. On the start menu press the start button on controller TWO and the words Chao Puzzle will appear on your VMU. Before you play Chao Puzzle press start on controller ONE and pause the game. Now you can play The Chao Puzzle. (Caution: if you play the chao puzzle off the start menu the game will freeze during the intro movie)

Vs. Gunrock in Power Stone Demo
If you want to fight Gunrock on the Power Stone demo, just select Gunrock with his alternate outfit (press B).Instead of going to London and facing Falcon, you will go to Dawnbolta and face Gunrock