Here's a kids PJs set only at Walmart in 2020/2021.
This set is bundled together with a paper-card strap so the pants and top don't get separated--but it also cannot be tried on. This comes in LITTLE kids sizes only. Even the large/xl won't fit someone much over like...12. (Which is too bad, it's an all-right design)
It's a modern set, with running forward Sonic on a light blue background, with some stars. The long sleeves of the tee are dark blue, and match the pants; and those don't seem to have a Sonic element. The slogan here is "It's All About Speed", which is written at a slant above Sonic. The picture of the outfit on the band helps judge what it will look like once you put it on. The price on this is unknown.