Blocking

[i_need_rice]

The problem is when my character attacks, and the other character is blocking, it causes to have a black box around it. Like in the picture above. This IS REALLY ANNOYING. Problem is I don't know what is wrong with it at all. It only happens when you block the move and it only happens for some characters. It only started happening after I got a new screenpack / lifebars. I think it's the hitsparks, but I'm not too sure. Please help.

[vgma2]

It looks like the hit spark's masking.

[MikeDaBike]

Looks like your screenpack got a new fightfx.sff and in that file some/all sprites are wrong, having a palette where the transparent color is in the wrong place.
This problem should only happen for chars that do not use their own hitsparks.

You could change the sprites in fightfx.sff per hand (extract and change the palette) or just replace fightfx.sff and fightfx.air with the standard MUGEN files or any other hitspark files.