Stumbled across this... you can find Tamagotchi Tricks here

# Never press the button in the back of the toy. It will reset the game and in effect kill your Tamagotchi chick in an instant. # When the battery power runs out, as long as you change the batteries (2 LR44) quickly, you can still save your Tamagotchi chick. # Press Buttons A and C together will turn off the sound. Do it again will turn the sound back on. # Press the "B" Button, you will be able to set the time. When you are in this "time setting" mode, press Buttons A and C together will suspend the game. The Tamagotchi chick will stop all functions. Press Buttons A and C to restart the game. # Depending on the Tamagotchi chick's age (or stage), it goes to bed at different times of the day. ...