Teenage Mutant Ninja Turtles - Platform: Gamecube

Playmates Art Go to the options and then go to the password screen. 
Next you will see 5 symbols (letters. Type in L S D R M that means Leo 
Splinter Don Raf and Mike. Ok then you should get a message that says 
PLAYMATES DATABASE IS UNLOCKED. Then go back to the main screen and go 
to data base. When you click on it a new screen should come up and say 
playmates with the picture of the turtles click on it and you will be 
looking at some cool art.   

Michelangelo will get an improved weapon in the story mode! 
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Go to the options and then go to the password screen. Next you will see 
5 symbols Put in MSRMM  

Get Challenge Mode Unlocked 
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Beat story mode using all 4 turtles  

Get Stage Select Levels 
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Beat a level to unlock it for Stage Select 

Get the Secret of Gembu 
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Beat Dojo Stage #3 using all 4 turtles and you get the Secret of Gembu move 
which will damage all enemies on screen  

Get Characters for Vs. Mode 
Casey Jones: Beat Stage 1 with Raphael 
Evil Turtlebot: Beat Stage 3 with any turtle 
Hun: Beat Stage 6 with Michaelangelo 
Splinter: Beat Dojo Stage 3 with Leonardo 
Shredder: Beat Shredder with any turtle 
Oroku Saki: Beat Saki with any turtle 
Yoshi Hamato: Beat Challenge Mode with any turtle  

New Costumes 
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Change your Gamecube System date to Dec 24th or 25th to get Santa outfits or 
October 31st for Halloween outfits.