MUGEN is a fighting game for PC. YOu can add custom everything, well I found Dopefish.
(I will not provide a link to MUGEN as its liscense is outdated and questionably illegal, find it yourself)
MUGEN info
http://en.wikipedia.org/wiki/MUGEN
Character
http://www.newwavemugen.com/~aokmaniac13/chars.html