Does this Sonic doll belong to the same 'set' (likely of just 2) that this Tails is from? They both have the rather unique tag placement, where it's a strap on the bottom of the foot, with the Sonic the Hedgehog logo on it. It seems likely that these guys were a pair (sold at the same time, not a 2-pack) He should be about the same size of about 13 inches high. The sculpt on the doll is all right, consistand with early plush, and the expression seems decent enough, even if the eyes are somewhat slanting.
Here's a plush that probably had a dual release.
It's a better look at the 'foot bottom tag' doll that's not very big. (Also appears on UK plush) This was likely released in the UK area as well as the USA. It's one of the few that have the colored cloth tag on the bottom of the foot, rather than the back of the doll. Note that it does have another on the back of the leg seam as well. Both Sonic & Tails were made by Tomy at the same time. The upper right photo in the montage here is the Tails.
With Tomy making plushes of Sonic again in 2017, it's interesting to compare their past work in the 1990s with the work they're doing today, with these plush photos.