This morning, my mother and I went to Target, mostly to get gifts for my brother's teachers since the last day of school is this Friday. We got to the aisle where they keep the Mixels so I could see if there were any we did not have. It turns out there were, in fact, some Mixels we did not have.
These were the only two from S8 they had, though, apart from another Tuth.
Edit: Here they are, built. Unfortunetely, Tuth is missing the two pieces for one of his legs. :( Edit 2: Tuth has been fixed as of yesterday. It turns out my brother built him wrong.