Codes
Here are some game genie codes that I still remember from way back in the 1990's.:
AGAPPT: This code will let Mario go down every pipe in every level and the same pipe that you come up out of you can also go back down in it. For Super Mario Brothers (NES).
Here are some weird level codes to for Super Mario Brothers (NES):
TNLPOG, VNLPOG, ENLPOG, GNLPOG AND STOPPK OR MIGHT BE STOOPK.
Here is a code that makes Mario Invinceble just like when he get's a star:
XXPPPO
We have more cheats and tips for this game here, Super Mario Bros. cheats
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