On the start screen, if you press ![]()
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the game will restart in "real mode" (you'll notice the red-tinted background on the start screen if it worked). With real mode enabled you'll be able to increase the game's difficulty (easy is what you normally play on).
On the start screen, if you press ![]()
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the game will prompt for the player's name. In story mode, the player will be referred to by this name instead of "partner."