User blog comment:AngryNoahs/My Sprites For Mugen Chars/@comment-3524611-20121121192127/@comment-3495717-20121121213522

ANY program where there's some form of pencil tool (Photoshop, GIMP, MMF2, Paint, etc.) can still produce the same, crappy or amazing sprites (remember, it's the user who creates the stuff, not the program). I could open up PS and free-hand just the same as I could in Paint - drawing is drawing; the program doesn't matter.

As for the sprites themselves, I can see that there was some free-hand used when making them, with it being particularly noticable on the Kenny and SpongeBob ones.