Thanks for the comments everyone!!
And maxxa, thanks for the advice. Some of these sprites I made almost a year ago, and I have improved a lot since then. If you notice, my newer sprites (including the two new sprites that I've posted since re-opening this thread, do have some black outline in them to add depth. In the three months that the MegaDex was closed I revamped a bunch of my older sprites and went back and added black into most of them. I'm working on getting those revamps posted but I'm having trouble with the burner on my other computer that I did them on. :\ Hoepfully I can get them transferred to this computer soon though.