Here's a turn-around for the 'big size' of the Segaworld Sydney Sonic plush. Now, you can finally see it from all of the angles and keep revealing that...
It's not the best. 

This size lets you see how they just weren't...paying attention to Sonic, I guess?
This would be on 'mutant gear' but really it belongs here as there were just so many of it at the theme park. Mitten hands: WHY? Their other dolls got fingers/it makes no sense. Then, the belly dot isn't a dot, it's the 'apron' of a teddybear. The ears are also wrong, they're tucked at the bottom and literally nothing else did this? What animal has that type of ear? The art has them as these obvious literal triangles. The nose is also an oval for some reason, which, ordinarily it wouldn't be too bad but then look at the side view, the face-front is super duper flat. It's also unlikely that just 'oh someone smooshed him in the bottom of a box for years'.
The tag in the right side photo has the usual copyrights/Sega but the date for it is 1997, which is pretty darn late for something this inacurate to have gotten made in mass quantities. It's interesting to see, even though it comes across a bit more as 'teddy' than Sonic.