The armadillo is one of the animals that inhabited Scorpion Ridge.
It has a round body, a long snout, gray skin, a long tail, large ears, and is quadruped.
Scooby-Doo And The Alien Invaders
It was first spotted by Crystal, who was ready to take a picture of it. The armadillo seems to be not mind at all. However, when Shaggy Rogers got spooked by the fake MPs, he jumped on Crystal, which made the armadillo curl into a ball.
Later, Scooby-Doo discovered the armadillo curled into a ball. He then got startled when it uncurled itself.