Kool Stuff
Up, Up, down, down, left, right, A, B, A entered onto the screen with start and options will bring up the Kool Stuff bar.

Scott stuff
On the start/option screen do x,b,a,y,up,left,down,right,and then press down. warning the code should be done right!

Cheat
At title screen enter select,a,b,foward,back,down,down,up ,up. Which gets you Kooler Stuff. It may take a couple of tries.