Sunky is a character created by LooneyDude, who is also the creator of the evil version of him, Sunky.MPEG.
Sunky looks like Sonic, but somewhat crudely drawn and with simple dots in place of the usual eyes and is smaller. His appearance is nearly the same as the original Sonic but has longer legs and arms and bigger and longer hands and shoes.
He is parody of Sonic from the Sunky The Game series, including Sunky's Schoolhouse.
The most notable difference here is that he has black eyes than red.