Let us examine Skarmory:
Gold, surprising not bad, doesnt have the red on its wings, but it looks decent.
Silver, if i may ask, what in gods name were they thinking?
Crystal, not bad, had the red wings and a decent sprite, but inferior to Gold Version.
Emerald, goes from gold sprite, to silver sprite, back to gold...
Diamon Pearl....awfully similar to Ruby/Sapphire...different shading and colors
Platinum, hope they didn't hurt themselves on that.
didn't know how to get R/S or FR/LG sprites, the site doesn't have their front sprites.