The Manticore is a lion like creature, with a scorpion tail, and wings. The Manticore was first encountered in the episode Elements of Harmony by the mane cast. It was was enraged by Nightmare Moon to create an obstacle for Twilight Sparkle and her friends when they were on a journey to find the Elements of Harmony. The problem with the Manticore was a thorn in it's paw, but the problem was fixed when Fluttershy stepped up and calmed/helped the poor Manticore.
Manticores have the body of lions, a scorpion's tail, and a pair of wings.