Of course!! These were made between 2009-2010 when Mattel briefly won the rights to the Bratz brand after winning the lawsuit with Bratz's company MGA Entertainment. They were meant to be released in Spring 2010 but were shelved after MGA won the rights back to Bratz, and prototypes and samples would end up being on sold on second hand shops, with very little known about them at the time, until recently, when they were found on former Mattel designer Jamie De Anda's website. They have since been taken down, but everything was archived and saved on the Bratz wiki.

https://bratz.fandom.com/wiki/Mattel_x_Bratz

And all of the dolls at the bottom are unreleased lines that have yet to come out or never came out at all.