ESPN International Winter Sports 2002 - Platform: Playstation 2

Bear costume
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Win all gold medals in the men's events in championship mode. Press L1 or R1
at the character selection screen to access the costume. Note: Using this 
costume will disqualify you from winning medals or setting records.

Penguin costume
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Win all gold medals in the women's events in championship mode. Press L1 or
R1 at the character selection screen to access the costume. Note: Using this 
costume will disqualify you from winning medals or setting records.

Robot costume
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Win all gold medals in the men's and women's events in trial mode. Press L1
or R1 at the character selection screen to access the costume. Note: Using
 this costume will disqualify you from winning medals or setting records.