Here is a tee by the brand Jumping Beans.
This brand is pretty well known, but only makes little kids size clothing. It's interesting to see them choosing Sonic to add to their design selections in 2020.
The tee is all just-about-Sonic colored blue. It has neoclassic jumping Sonic set up where it looks like he is jumping out of a checkered circle that is the background. It spells out "Sonic the Hedgehog" in a fot that's pretty similar to the logo around the design. It's cute, simple, and a fun design for little kids. This is likely a Kohls item, but should also be found elsewhere Jumping Beans clothes are sold.