Xavier is a male Xenotarsosaurus from South America who was a member of the Dinos A to Z. He was riding the Dinosaur Train when the Pteranodon family and Mr. Conductor were rallying the dinosaurs for the Dinos A to Z picnic. When Shiny realized that they skipped the letter X, she began to panic until Xavier walked out of the Dinosaur Train bathroom and introduced himself to the kids.

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