This is the "Checker Circle" tee.
It's new for 2020/summer season. The all black tee has a yellow/black checkered circle in the middle, with the standard classic style Sonic face in full color. A font similar to the logo's font spells out his name curved below in blue.
It's a simple design, but with the bright checkering & classic face it just has a very....classic feel / if they were going for a nostalgic type of tee it does succeede. This may be an Amazon item.