Wrong.
Number 1, those ef_***.pac files serve for ALMOST nothing or even nothing (i once had someone report that they got 1 effect to change by editing those files, but it never worked for me). Those ef_***.pac are just the first method brawl was going to use for effects, all they contain is the base .pac structure, which actually does nothing but set up a storage container. You have the basic stuff, which handles the individual characters themselves (the fighter folders), then you have the stuff that loads the different files at different points and you have the characters module files. I could go into everything i know of about constructing a character from scratch, but that would be a very long and boring read, but just so you know, a character is a tonne more than just 1 file.
I once started a project to completely hard code a new character slot in, it would have only gotten around to having about 60-ish% of the information i would have needed. I could have had less or more, but from a quick summary of looking at everything, i was roughly around there. Trust me, if reviving the forbidden 7 was only 100 lines of code, it would have happened LONG ago.
Next time you are going to start a new thread on something, research a little bit.