Super Metroid is the third game in the Metroid series, released for the SNES in 1994. Currently, it is the most widely-hacked Metroid game, and has the most resources available to help hackers, all information relates to the specific ROM: “Super Metroid (JU) [!].smc”, it has CRC D63ED5F8, sha1 DA957F0D63D14CB441D215462904C4FA8519C613. Unheadered ROM size is 3,145,728 bytes, for information related to patching this ROM please check Patching a ROM for more information.
For editing Super Metroid, SMILE 2.5 is the primary tool used; a more updated version Parlor is available, but is unstable. Most information here will be with 2.5. SMILE has two derivatives currently in production, SMILE JX created by JAM and SMILE RF by Scyzer.
A list of guides created by the community, from manuals on the tools themselves to advanced guides relating to ASM, its all here.
Manuals of the workings of all the editors and utilities available to you, detailing all their functions.
These guides cover all the basic things around editing Metroid, as well as serving as a good starting point for learning how to get into Metroid hacking!
These guides assume you have a good basic knowledge about editing Super Metroid already, you should probably be comfortable with using SMILE by now and be moving onto using tools like a hex editor.
These guides could be pretty complex, you should probably be comfortable with assembly by now.
This segment is reserved for technical information on Super Metroid, to be used as reference material for hackers, or for the curious wanting to know what makes Samus tick, or possibly you are interested in making a fan game and want to know how Super Metroid does things!
Data maps of ARAM, VRAM, RAM, and ROM are here.