Level select 
At the new game "Stamper" menu, 
hold L1 + L2 + R1 + R2 + Left + O + Select.

Hidden sounds 
Select the sound test option and listen to the first six introduction 
sounds. Then Tiny will recite various trivia and miscellaneous sound 
clips after the instructions and normal reports.

Cheat Codes 
At the options "Stamper" menu, 
hold L1 + L2 + R1 + R2 + Left + O + Triangle + Square and press X 
to display the cheat codes entry screen. Then, enter one of the 
following codes to activate the corresponding cheat function:

Weak opponents 
Enter WEAKROBOT at the cheat codes screen.

Little Tiny 
Enter TINYTINY at the cheat codes screen.

Low gravity 
Enter FEATHER at the cheat codes screen.