Ultimasaurus (Jurassic Park: Chaos Effect)

Chaos Genesis: Tyrannosaurus rex, Velociraptor, Triceratops, Ankylosaurus, and Stegosaurus.
Tyrannosaurus rex: Giant, bipedal, predatorial dinosaur.
Velociraptor: Agile, highly intelligent, ferocious hunter.
Triceratops: Large, three-horned, plant-eating dinosaur.
Ankylosaurus: Land-based, armored herbivorous dinosaur.
Stegosaurus: Large, armored-plated herbivorous dinosaur.
Length: 50 feet
Weight: 8 tons
Diet: Carnivore
Behavior: Meaning "maximum or final lizard," the CHAOS geneticists has created a hybrid from the DNA of various dinosaur species that represents the pinnacle of genetic recreation and its ferocity has taken to the highest level. But this was no ordinary hybrid dinosaur: it had the head, neck, and sharp teeth of a Tyrannosaurus rex, that were designed to crush bone and kill and had forward-facing eyes that would've given it binocular-vision and depth perception. But it had more muscle in its neck to help support its huge head. With its sickle-like claw on its foot of a raptor's, elongated arms, a flexible spike-tipped tail of a Stegosaurus's, massive horns of a Triceratops, a bony neck frill, and body covered in tough armor of an Ankylosaurus's, this was a deadly, highly aggressive, and very tough, powerful predator. Its dark coloration would've been good for camouflage at night, while its lime green eyes would've been excellent for having night vision. When this dinosaur is on the loose and is hungry, there was little to escape.

One of the unreleased toys though!

Jurassic Park: Chaos Effect toy line is owned by Kenner