Well that's what I'm trying to figure out. The rest of the gallery looked pretty suss and since I've made this topic, they added a new "adoptable" which has the exact same pixel base but different clothes etc. I know I saw a creator thing a while ago that looked a lot like the style, I wanted to find it so I could make sure if they're actually selling copyrighted designs or not.
I rather doubt it, considering the fact that there are some differences in the pixel bases when you compare it to that of Tinier me. The feet are different, I don't think they actually have eyes like that on Tinierme (though I'm not positive), and on the overall it's much more...glittery. The design itself is very simple compared to some, probably more desirable designs on the site. It seems to me that she just took some style inspiration from the site, and that's why her adoptables look very similar. As for the base, she probably just wants to do less work and make them look consistent and pretty. At the very least, she didn't copy-paste any of these.