well photobucket really resized any pics. you need to have the original sheet (original size) then upload to imageshack or here http://neuropod.net/imagehost/
I like their sprites.Like Ultraboard101 said since they have A lack of sprites,you can create your own.Just by editing other sprites...I usually make my own sprites when I get A sprite sheet.I am still learning how to code so sadly I can't help you with them.I do think they should be in Mugen though.