The main dinosaur in the Aladar movie is an Iguanodon. Iguanodon was a herbivorous dinosaur that lived during the Early Cretaceous period, about 125 million years ago, and had a distinctive thumb spike that it likely used for defense or foraging. In the movie, Aladar is portrayed as a sympathetic and intelligent Iguanodon who is separated from his own kind and must navigate a dangerous world with the help of a group of lemurs. The movie was released in 2000 and was a combination of live-action backgrounds and computer-generated dinosaur characters.