This only works if each animation is it's own psd/gif however so no need to care about a whole spritesheet at once, it's per anim problem (and most of the time a minor issue). I needed to move second one a fair bit to the left through pivot before it was in-line with other poses. It's a TAD bit awkward because Megaman X only had 16 walking frames instead of 22 like the AVWW chars do, but I think I made it work pretty well. I end up doing this for my own game from time to time when I get files from an animator, only takes few minutes. I so gathered up some old Megaman X sprites and jury-rigged something up with GIMP. But if given image has a different size or it feels off then you can wiggle with it to get it into place compared to your other animations. Base is 0.5, 0.5 aka exactly in the middle of the image. That being said - game engines generally DO have options to align your individual animations (in Unity it's called a pivot). That format is not meant for easily reusing in your own projects.
Well yea, it was extracted from a game which used Sprite Atlas or equivalent to pack them up neatly. Just wasted 3 hours cutting up this sheet for nothing.
