Pachysaurolophus was part of the toy line Jurassic Park: Chaos Effect, by Kenner. It is a mix of Pachycephalosaurus and Parasaurolophus. Unfortunately, this toy was never released by Kenner.
Physical description

This odd looking creature was the first hybrid that was made from two herbivorous dinosaurs. Thought to be easier to control, but it has an aggressive mood. The crest is not fragile but strong, and got a razor sharp edge that cuts nasty wounds when it rams the unlucky victim.
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