Wikipedia
Xtractaurs is a line of toys by Mattel. Recently introduced in 2009, the brand is a fusion of regular action figures with an online game. It involves taking a dinosaur (both well-known and lesser-known dinosaurs) and extracting " DNA" samples from the dinosaur and analyzing it on your computer, similar in a way to the book and film Jurassic Park. If you own multiple dinosaurs and have extracted samples from all of them, you can create a genetically engineered hybrid on the computer to battle the "Megavores", ancient reawakened dinosaurs that share qualities with your dinosaur. Each dinosaur you purchase has a special ability, and combining them makes a fierce fighting animal (your first dinosaur, Tyrannosaurus Rex, has the Chomp ability). This encourages the fusion of certain samples even more.
The www.xtractaurs.com site has been taken down, and no usable site has been implemented for the toy series. As a result, there is no use for the toy sets other than display.