You can place the sprites you've done from a character in a different style like Marvel vs Capcom, Capcom vs SNK, King of Fighters, Etc.

Jeff Andonuts from Earthbound

http://vignette2.wikia.nocookie.net/ssbb/images/7/7e/Jeff_SSBB.jpg/revision/latest?cb=20100727210834&path-prefix=es
http://orig11.deviantart.net/d3fc/f/2016/110/d/c/mvc_jeff_2_0_by_greasy_lucarioyun-d9zmdln.png


Brief Rocks from Panty & Stocking with Garterbelt
http://vignette2.wikia.nocookie.net/cartoonfatness/images/4/4b/Brief.png/revision/latest?cb=20141219120734
http://orig05.deviantart.net/a7a8/f/2016/110/1/7/mvc_brief_by_greasy_lucarioyun-d9znu6v.png


Strength Jr. from Magical Drop F
http://vignette3.wikia.nocookie.net/fantendo/images/b/b7/Strength_Junior.png/revision/latest?cb=20151014230923
http://orig13.deviantart.net/4d9b/f/2016/112/6/d/mvc_strength_jr__by_greasy_lucarioyun-d9ztwuk.png