You know, that's a good question. If we are talking about a fan game like a Mario fan game, then this would be the answer I would come up with.
Since the sprites are created/edited by another person, it would make sense for the creator to post the sprites onto this site himself. If you are a friend of the creator and/or have the proper permission to submit the sprites on his behalf, then I think someone would hear you out about that. Otherwise, you a better off leaving the sprites alone.
EDIT: By the way, I just realized that this might not be the proper section to ask a question like this. If you have questions that are specific to this forum and the main site, might I suggest you ask them on this board for now on?
http://www.vg-resource.com/forumdisplay.php?fid=3
Since the sprites are created/edited by another person, it would make sense for the creator to post the sprites onto this site himself. If you are a friend of the creator and/or have the proper permission to submit the sprites on his behalf, then I think someone would hear you out about that. Otherwise, you a better off leaving the sprites alone.
EDIT: By the way, I just realized that this might not be the proper section to ask a question like this. If you have questions that are specific to this forum and the main site, might I suggest you ask them on this board for now on?
http://www.vg-resource.com/forumdisplay.php?fid=3