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Dreamcast - Marvel vs. Capcom 2 - New Age Heroes cheats

Earn points without play:
Go to training mode. You will earn 10 points for each minutes. Select your 
fighter and opponent, then leave the game on for a few hours.
Do not pause the game.

Change skins:
Go to the fighter selection screen, highlight a character and press A or Y.

Secret characters for lower price:
Quit and enter to the shop. Repeat this until the price of the hidden 
characters will be lower.

Same character selection in arcade mode:
Reach 99 experience level and unlock everything in the shop 
to choose the same character up to 3 times.