To unlock extra normal levels, do this:
Effect - Code
Mario 5, 6, 7 - Complete Mario's 1st 4 Levels.
Mario 8, 9, 10 - Complete Mario's 5th, 6th, and 7th Levels.
Wario 5, 6, 7 - Complete Wario's 1st 4 Levels.
Wario 8, 9, 10 - Complete Wario's 5th, 6th, and 7th Levels.
Wario's Super Picross (Wario 1, 2, 3, 4) - Complete Mario's 1st Level.
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