Chao Adventure
Infinite Energy: Change Chao's name to 1234567.
Level Skip: Get a Chao from Sonic Adventure first.
Then, when your Chao gets to the end of an area it will ask
you where you want to go. Select the place you want to go
and immediately press the mode button. Then press the mode
button two more times and you will be back on the Chao Adventure
screen. Just let the Chao start walking and it will let you
select the next area. You can repeat this as many times as
you want.