Thrasher T. rex (Jurassic Park: Chaos Effect)

Chaos Genesis: Tyrannosaurus rex
Tyrannosaurus rex: Ferocious, bipedal, predatorial carnivore.
Length: 40 feet
Weight: 8 tons
Diet: Carnivore
Behavior: Undisputed king of the dinosaurs, the Thrasher T. rex is a gentically-altered Tyrannosaurus rex with enhanced predatorial characteristics. Accelerated pigment coloration gives the T. rex its distinctive markings and shockingly vibrant hue - a side effect of the genetic mutation process. Hyper-developed musculature makes this kingly beast stronger and faster than its natural counterpart. Enhanced senses improve predatorial proficiency, ultimately creating one of the highest level hunters ever to exist. Powerful locking jaws clamp down on its unfortunate victims while it "thrashes" its prey into submission. Resistance to this predator is futile. Be afraid... be very afraid! 

Bio from the package

I have this toy of it actually and used it as reference of the coloration.  

Pose based on Brett Booth's illustration of Giganotosaurus (photos1.blogger.com/img/245/72… and www.wikidino.com/wp-content/up…)

Jurassic Park: Chaos Effect toy line is owned by Kenner