Yu-Gi-Oh! GX Tag Force 2 - Platform: Sony PSP

Free cards:
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There are free cards all over the map. Look on the ground and behind some 
walls to see if there are any hidden cards. Some cards are being stood on. 
To get these cards, skip school and go to where the people stood on the cards.

Classroom:
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There is a time that you must go into the basement on the school. To use the 
ladders, press Square on the arrows.

Infinite loop:
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When dueling against Axel, have a monster out on the field that is the only 
one out that negates effects targeted to its own type (for example, Cyber 
Phoenix). If the CPU has Tri-Blaze Accelerator or Blaze Accelerator out 
and selects the monster (Cyber Phoenix), its effect will negate 
Tri-Blaze/Blaze and Axel will not discard a Pyro-type monster. This will 
continue in an infinite loop until you exit the game or turn off the PSP.