Okay, sorry for keeping this topic alive and active for so many times, but I think this is correct because I tested the skin in mm8bdm and I saw the sprites in slade, this changes the frontal, F,F/S and S rotation for the hurt sprite because in the prior version his eyelids were white, now they are like mega man's pink-ish color. The link is down below. I couldn't test the boss sprites like the sliding or jumping ones because I don't know if I use the "add pk3/wad button" would work or if it would screw everything. I apologize if someone downloaded the prior versions. I think there's no mistakes, if it works and once I get an answer from the developers, this topic can be closed.
https://www.dropbox.com/home?preview=copyrobot.pk3 (https://www.dropbox.com/home?preview=copyrobot.pk3)
If there's any mistake or inconsistency here, please tell me, I will appreciate very much the help. (Also, in the files the skin is called "Copy Robot" instead of "Mega Man?" because I don't know if it would crap the skin.
And thanks for the feedback Bass! :)
EDIT: I could applied the file to mm8dbm by doing some changes, his minoboss' sprites changed, but his vanilla skin was still the same for some reason, but I'm sure these sprites works as a skin because I tested the pk3 I uploaded. Here's some screenshots of the fight:
(http://i.imgur.com/k4jvPvR.png)
(http://i.imgur.com/NpwHmmp.png)
(http://i.imgur.com/GpI8VmC.png)
(http://i.imgur.com/mYPsgaG.png)
(http://i.imgur.com/nl9goy0.png)
I don't think the eyes in the M and N frames need to be changed, since it helps make him look exhausted. Compare his sprites to Mega Man's equivalents:
(https://s18.postimg.org/4gydmwfvd/mmcb.png)