Spiderman by Matheus. An early version of Spider-Man, dating back to 2000. Seems quite unfinished. Even the author himself said that it's a beta, according to his site. Converted for newer versions of MUGEN. Found it in an old WinMUGEN compilation.
https://mega.nz/file/Na0zGDQa#W0XqHlfTgxsd9Wa5hIIdtO7CeYicv0CSg9VG1Fig5rw
I don't know if you're going to add this version of Spider-Man or not, but you can mark it as unfinished, once that you're done taking a look at it.
Homem Aranha (Yep, that's his actual name and displayname) by [CZ]Seiya. A pretty low-quality version of Spider-Man that appears to have some poorly ripped sprites, in addition to some bloated stats. Looks like a spriteswap of a certain DBZ character, judging by its death cry. I'm not too sure though.
https://mega.nz/file/YKtClCga#FRZGGg__PtexAeGzDYsQ54yYoswsWqe8UNcPzmMv4EE
According to the Readme, it says that the character is 100% done, but I think it is so poorly rushed that it needs a lot of work to be done, especially with the spritework.