Metroid Database.com

Metroid Construction's Begrimed, known for his seminal hack, Super Metroid Project Base has once again created something incredible and important for the hacking community. He calls it SMMM and since I'm only loosely familiar with the Super Metroid hacking scene, I will let him tell you himself why this guide is an important resource:

I wrote SMMM to take everything that's been learned about Super Metroid hacking over the last thirteen+ years and present it in a way that hopefully makes the hobby incredibly more accessible to people who have never modified video games before, but always liked the idea of trying it. A lot of the concepts explained throughout the guide apply to ROM hacking in general. SMMM is the result of nearly a year of writing and creating images for sometimes hours daily, and many more years of gathering information from the Metroid Construction forum and #metconst/#MetroidCloud IRC channels.

And there you have it. You can find the guide here.

--Infinity's End