Basically. Don't use paint default colors. Get colors from other pokemon, on your recolors. Which are quite horrid because you used paint default.
On your revamps, all you did was change the colors. You need to add more shading, replace the white, change the colors, add a couple more colors.
Also, I'm not sure, but it looks like you used GSC Kingler colors. Make sure you always use FR/LG and sometimes RSE colors.