This is awesome =) I have some good ideas, and I HAVE to do something on this one...I dont wanna go for the regular robotmaster (the official ones disappoint me quite a lot, they are all old designs with one minor armor part changed)
I want to make one of those GOOFY looking robotmasters...I think they're hillarous.
hahah. I know what you mean with the 5 colors! I started pixeling with megaman sprites so that boogled my mind as well.
Basically, think of it like this: Normally, for nes everything can only have 3 colors per tile.
The megaman developers wanted to make megaman more realistic, they wanted to give him a face with skin color, so they wasted a 8x8 sprite there for that.
So if you want to use more than 3 skin colors, try to make it only in a 8x8 area of the sprite.
Even though I'm no expert I could try to explain the other limitations, but you have another doubt you can post it here unless you want me to give u more lip than I have to
EDIT: DAMN u adam Atomic
and a crit for your WarpWoman Ryona...while you know how to make a curvilcious woman, you are not posing her like one, so when one reads her in real size the negative space that indicates her waist gets totally lost, because the way her arms go straight down create a sort of square that brings all the attention away from her body...