Arthur

 [SPOILERS: This article may contain major plot or ending details.]

 Arthur (Japanese: アサオ Asao) is a character introduced in the midgame of Pokémon Starlight. He was the puppet leader of Team Colothel and aspired to restore the Mirriko Kingdom with the help of the Celestial Pokémon, Cellumina. He was later revealed to be Earl himself, as a disguise to avoid humans from seeing him as a Pokémon.

His full name is Earl Gervasius. (Japanese: アルコー・ガーベアーズ  Aruko Gabeazu)