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Gamecube - Sponge Bob Squarepants: Battle For Bikini Bottom cheats

Pause game play, then hold L + R and quickly press the following button 
combinations:

Get 1,000 shiny objects: 
Y, X, X, Y, Y, X, X, Y. 

Get 10 Golden Spatulas: 
X, Y, Y, X, X, Y, Y, X. 

Refill health: 
X(4 times), Y, X, Y, X, Y(4 times). 

Get Bubble bowl power-up: 
X, Y, X, Y, X, X, Y, Y.

Get Cruise bubble power-up: 
Y, X, Y, X, Y, Y, X, X.

All monsters available in the gallery: 
X, Y, X, Y, Y, X, Y, X.

Pantless SpongeBob: 
X(4 times), Y, X, X, Y, X, Y, Y, X.

Big plankton: 
Y(4 times), X, Y, X, Y, X(4 times).

Tiny people (fishes times): 
Y(5 times), X, Y, X, Y, X, Y, X. 

Concept art: 
Go to the 3rd part of Bikini Bottom. 
Collect 40,000 shiny objects. Go to the movie theater and hit R to go inside. 
Hit A to see the art.