Access Cheat Code Screen:
Go to the option Stamper menu, press and hold R1 + R2 + L1 + L2. Then press Left and then Right.
Type in FEATHER at the Cheat Code Screen.
At the new game Stamper menu, press L1 + L2 + R1 + R2 + Left + Circle + Select at the same time.
If you put WEAKROBOT in on the type cheats screen you will have an easier time defeating the robots.
If you put TINYTINY in the type cheats screen you will be able to play tiny at almost the same size as the minni tanks that tiny uses.
Thanks to Revolution reader Craig Jepson, Marc Bernard and Deke Nihteshtk!