These are based off @billiman_mcjonnson's sheet and my Sonic 3 sprites project. Other than that, i made them. No permission needed to use, just give credit. The tail sprites are used for the ones without the tail so you can basically do what the devs did with Tails in Sonic 2 & 3, just join the tail sprites and the movement sprites. Also, pay attention that the rolling sprites do have a tail, it's just very subtle.