an aesthetic example of how I imagine sonic in the cpc 464 (color). Of course, the sprite is so big that I doubt a real amstrad could move it. 16 colours.
SEGA Master System has way better graphics than CPC, even though they are both 8 bit machines. Has bigger palette (64), more colors on screen (32) and better resolution (256x224) plus hardware scrolling and hardware sprites which CPC lacks. More or less Master System is an 8bit arcade.
CPC "Plus" had better graphics but was still worse than a Master System.
gotta go fast
Dithering has it's uses such as for texture and 'blending' certain ranges of colours where it can work but I tend to avoid it's use on sprite work because as I said, it can look quite noisy when sprites are animating.
Also there's no harm in looking at the 16 bit Sonic when trying to demake it into 8-bit. The Amstrad CPC and Master System have very different graphic capabilities as do other 8-bit systems and their best graphics are usually those that are tailor-made to make the most out of that machine's abilities. You did well with the actual sprite design of Sonic here. Even though it's in the 'wide-pixel' Mode 0 resolution of the CPC it doesn't look overly blocky. All I did was do some very minor work on shape and refine the colour shading in places. I've got quite a lot of experience with CPC stuff (I'm actually developing two games using that CPC-style res and palette, as you can probably see in my gallery) and still own my real CPC 464 as well. :)
Thanks Carnivac... your version is of incredible quality for an amstrad computer!! this piece has got about 2 years thats why its so empty. I didnt put too much effort appart from looking up master system version (you know megadrive is too much for and 8 bit computer to emulate... well that was before looking at your version! good!). I started pixeling seriously recently and before all my pixel works (like this one) where not very serious. I see dithering is avoided by a lot of artists. I always try to use minimal dither because sometimes it doesnt look bad.
Oh I did a quick edit on Sonic here to show how you can use the colours and shading to give him more of a bold, 'three dimensional' cartoon look and remove some of the dithering (which can look fuzzy in motion). It's not perfect (I should probably have looked up a Mega Drive Sonic sprite as reference rather than go by memory alone but I hope it helps some in understanding the palette's potential a bit more. :)
Yes it could move that sprite. It's had games with bigger sprites (like Savage for example has a main player sprite 10 pixels taller than your Sonic) running quite nicely. The balance between smooth scrolling and a big enough screen area for a Sonic-type game (so you can see far enough ahead going at speed) would be the main problem. Could certainly still be playable though if compromised.
Nice work. :)