This document is for Super Mario Bros. 3 for the NES.

There is nothing really “new” in this document. I made it to organize the enemy data and object data as it appears in the SMB3 ROM. This is useful if you intend to expand the enemy data and/or the object data of one level and overwrite the data of at least one other level in the process. If you do not know which level(s) you are overwriting, it can make editing the levels more difficult later on because you will lose track of what free room you have.

I also wanted to see the proper order of the enemy data and object data for myself because as I was working on an SMB3 hack, I ran into a few level issues and one of my ideas was to check to see if the problems were being caused by preceding and/or succeeding levels. Since I took the time to type this up for that purpose, I thought that maybe someone else might find it useful as well.