Worlds 4 and 7
Its very simple yet very complex.
To get to World 4 you have to beat Level 2-Castle with a Mini-Mario/Mini-Luigi.
To get to World 7 you have to beat Level 5-Castle with a Mini-Mario/Mini-Luigi.
Also, after you beat the game push the following buttons in this order:L,are,L,are,X,X,Y,Y.This takes you into Secret Challenge Mode where you can't go backwards. {Like in Super Mario Bros,the orignal you can't go back for anything.}
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Moemoerocks
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