Vlix was only released in Brazil, by glasslite, but allegedly only about 2,000 of them ever made it to stores. Of those, probably very few remain.
Regarding Blue Snaggletooth, I’m not saying he’s Vlix level rare or anything close to it, but he might be the rarer of the two between him and Yak Face, who was only available on a tri-logo card outside of the US (if memory serves). I really don’t know when it comes to numbers produced, but when I bought my copies of each they were the priciest, and Blue Snaggletooth seems to cost slightly more, which would imply more scarcity.