Complex sentence: Panthor is portrayed as Skeletor's pet, being at the right of his throne (like a panther Persian for Skeletor), but in battle, Panthor dons an armor that allows Skeletor ride him.
Split into simpler sentences: Panthor is portrayed as Skeletor's pet, being at the right of his throne. In battle, Panthor dons an armor that allows Skeletor ride him.