Aegislash is a single sword, unlike its pre-evolution, that is slightly golden in color and has a strange, jagged-edged blade, it has a single, purple eye with a white pupil and no sheath, but instead a rather large shield with circular patterns on it being held by its "arms", which are purple cloth. Aegislash has long been seen as a symbol of royalty.
According to the Pokédex, these Pokémon were used as guards by the nobility of Kalos. They can manipulate the thoughts and actions of people or Pokémon. They were well known for detecting the innate qualities of leadership and whoever it recognizes is destined to be a king.