These can include hit sparks, guard sparks, projectiles, smoke, hyper backgrounds or just about anything you can imagine that would be useful.
In addition to the required character sprites you may also wish to add a variety of special effect sprites to your character. Although this numbering pattern is standard, it is not required with a few exceptions (those being Turn and Get Hit sprite groups). The sprite group numbers listed above next to the descriptions are suggested groups to assign your sprites to as you add them to your SFF file. A typical M.U.G.E.N character will have the following sets of sprites: Mugen compatible sprites need to be 256 colors, contain the desired transparent color as index 0, and saved as a pcx graphic format. To begin with, you should have all of the character sprites that you want to use before continuing to the next section.