so you know sonic mars one of the first concepts of xtreme so there was a pitch demo for it. there are other sprites for mars that looks that sonic from the demo mixed with cutscene sonic but anyway I was looking at the demos and thought if i could make new sprites for mars with the demo we have so I made new sprites for sonic, rings, some spike ball thing, and the thing with tails, it took 2 days but I finished them (these animations are from the demo but I extracted them from the demo)
Credit to Chris Senn and Sega for the pitch demo and Sonic and Music
