The Pixel Kingdom
Original title: Super Mario Bros.
Platform: Nintendo Entertainment System
Region: USA (Update Hacks)
Media: Cartridge
Controller: NES Gamepad
Genre: Platformer 
Gametype: Hack
Release Year: 2008
Hacked by: Tyrukia
Version: 1.0
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A graphics hack that is the opposite of most; instead of an improvement, it is a downgrade. The effects are pretty cool. Be sure to check out the castle level.

http://www.romhacking.net/hacks/394/