This long sleeve black shirt appears in Kohls stores only, and it is a fall/winter 2020 release.
The art here is neoclassic for flying Tails, and probably touched-up classic for running profile Sonic & standard pose Knuckles. Sonic is the only one in full color, as the others are blue line art only. Between strips of blue checkers at the top of the shirt is "Sonic" spelled out in red with a tall font.
It's a decent design, not extremely innovative, but nicely done. It is in the kids/teens boy area but if you can get an XL it may still fit. This should be about 12 dollars in stores.