World Poker Tour 2K6 - Platform: Gameboy Advance

Snappy mode:
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Hold L and press R at the main menu. This mode disables all intermission sequences. 
Repeat the code to disable its effect.

All-Seeing mode:
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Highlight the "Options" button at the main menu then hold L and press R. 
This mode allows you to play with open cards. Repeat the code to disable its effect.

Victory mode:
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Highlight the "Credits" button at the main menu then hold L and press R. 
You will win everything. Repeat the code to disable its effect.