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Nintendo DS - Big Brain Academy cheats

Unlock Practice mode Big Brain medals:
Get a score higher than the indicated number of grams to earn the 
indicated medals:

Get Bronze Medal:
Get a score higher than 50 grams

Get Silver Medal:
Get a score higher than 150 grams

Get Gold Medal:
Get a score higher than 250 grams

Get Platinum Medal:
Get a score higher than 350 to 400 grams.