Yeth is a great character.  Originally as part of a fangame, it's time Yeth was brought over to the main cannon.  White streak, speeds by, Yeth.

Unlike other characters, Yeth cannot spindash, giving him a unique control scheme, and his fangame is iconic of a certain type of Sonic ROM Hack.  I would like to request Yeth's inclusion in the next game.

http://info.sonicretro.org/Yeth