I got a shirt a while ago that has the same "Sonic" - the shirt with the hedgehog playing in blue paint. I know this is a different drawing, but it feels like a copy+paste of that one. Didn't even try a different style or approach, just "look at the cute animals."
As a Sonic fan, it's genuinely disappointing. But as a shirt.woot voter, it's not surprising. Ah well!