Cheat 1: Secret codes;
go to "home" in the game map and you will be asked if you want to save the game. write the following passwords + F1 several times until the borders of the screen flash to get extra features.
"nut": both players will get super strenght x 16 (this is a developer's cheat so some bugs might occur)
"mad": both players will get life x 16 (this is a developer's cheat so some graphical bugs will occur)
Cheat 2:All Kai Magazine games have a spoon to be found.
In this game the spoon is needed to enter the final boss fight in the kai magazine building.
You will get the spoon from kiyoko at Lilo's house only after defeating the thugs at the park.