The Secret Trait of One-Way-Doors in Super Mario Maker 2 and How to Use it!

One Way Doors in Super Mario Maker 2 have a really unique secret property. A small but unbelievably useful trait that allows us to build insane contraptions in Super Mario Maker 2! Keys that activate pipes, doors that only open up once all enemies are defeated, on/off blocks that activate bullet blasters and much much more becomes possible, thanks to this little One Way Door property! In this video we are first going to take a look at a stage that uses this little mechanic, and afterwards we are going to discuss how all of it works, and how to use it!

----- Level shown in the video:
The Keys are Key!
SCS-X8B-TSF

------------Credits for the Music---------------

------Holfix

HolFix - Beyond The Kingdom


------ Super Mario Sunshine OST
Bianco Hills

----- Mario and Luigi Superstar Saga OST
Teehee Valley

------Kevin MacLeod
"Adventure Meme", “Amazing Plan”
Kevin MacLeod incompetech.com
Licensed under Creative Commons: By Attribution 3.0

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