Baryonyx does not appear in the game's story, but the Amber Brick that unlocks it is found in the level "The Crash Site" with the Minikits (or bone boxes) for that level unlocking its skeleton skin as well. It is the only large theropod in the game that lacks a LEGO Amber destroying roar, instead being able to smash through hard objects that is usually destroyed by dinosaurs such as Triceratops and Pachycephalosaurus. Interestingly, as it seems to based on the Spinosaurus model, the playable Baryonyx is far too big, dwarfing even Indominus rex in size.
Baryonyx and Troodon are the only dinosaurs featured in LEGO Jurassic World that didn't physically appear in the films. Baryonyx was mentioned as being planned for Jurassic Park according to maps and was one of the dinosaurs that resided in Jurassic World. It was mentioned by Billy Brennan in Jurassic Park III as being on InGen's List.