Metroid: Pocket Edition
Original title: Metroid
Platform: Nintendo Entertainment System
Region: USA (Update Hacks)
Media: Cartridge
Controller: NES Gamepad
Genre: Platformer 
Gametype: Hack
Players: 1
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Most graphics updated to look more like Metroid Zero Mission. Other changes (energy, animations) kept minimal so this can be mixed and matched with other level mods.

http://www.gbatemp.net/index.php?showtopic=87680