Ardos is a villain from the videogame Pokémon XD: Gale of Darkness. He is one of the 5 Cipher Admins.
Besides being a Cipher Admin, he's also one of Grand Master Greevil's two bodyguards, the other one being Eldes. At the end of the game it is Ardos is revealed to be one of Greevil's two sons. The first time he is encountered, he is simply called "Mystery Man".
Ardos saves Michael's sister from a thug at the beginning of the game just because he did not want to be exposed for his true plans, and he later ends up battling Michael to try to stop him from stopping Cipher's plot. As proven in the end of the game, Ardos appears to be completely loyal to Cipher, even calling his own father "Grand Master" Greevil but then at the end it turns out that all he cares about is power willing to use his own father and made him to go on to make more Shadow Pokemon even thought he has redeemed him self Ardos is willing to do anything to ensure Cipher's survival.
Ardos somehow manages to avoid arrest, and he can be battled in the 6xth round of the Orre Colosseum. He explains to Michael that he fully intends to revive Cipher, and after that, he will declare Michael as Cipher's biggest enemy and having Cipher constantly watch him.