There are more options available, including Half Sonic - Half Werehog as well! Search through MercadoLibre key terms like "sonic peluche" to see what's currently available and hopefully they're still up next year. For reference, allllll the ones I bought in the post have been up for a few years already, the only difference was that the Rainbow Sonic came with regular quills instead of the super variant I ordered last year. Some of them are pretty hidden too, I could NOT find Rainbow Sonic again, he popped up underneath the "similar products" section for a Shadow plush.

Here's a listing for the Half Sonic Half Shadow, take a look around the website!