Two major porn studios have made X-Men porn parodies entitled X-Girls. What can you do, it’s a great concept and an obvious title.
Adam & Eve released X Girls (sometimes spelled with a hyphen, though the box cover doesn’t seem to have one) in 2000 right after the first Hollywood X-Men movie. Stuart Canterbury directed. Available in various formats at Sugar DVD and AEBN and Hot Movies.
The X Girls are: Angelica Sin as Flare, Bridgette Kerkove as Vanishing Vixen, and Gina Ryder as Mesmeratrix. (You can probably figure out their superpowers from their X names). Oddly enough, none of those three made the box cover; that honor went to Silvia Saint as a kidnapped ambassador, Chloe as supervillain Mind Force, and Jewel De’Nyle as an evil robot. Evan Stone and Mike Horner also play supervillains
Private followed in 2007 with its own X-Girls, clearly hyphenated and subtitled “The Lost X-Teens”. Tiny Thai pornstar Priva stars along with Judith Fox, Katalin, Nikki Rider and Tera Bond.