According to legend, Anubyss, Shuriel and Seraphinx used to live on Earth. They made their home near the gates to their realms. However, their evergrowing power became on a burden on the human life force. So Arceus created Ankhey to go down to earth and move the three of them into their realms. Knowing it was Arceus's will, the three moved willingly. But to ensure they were never tempted to return to the human plane again, Ankhey used the key given to it and locked the gates. It then departed to hidden home to rest, in case the three attempted to escape.
Anubyss is a two-headed bipedal jackal Pokémon. Its fur is a dark black with two white stripes going across its back. Its canine teeth are very large and its tongue is forked like a snake. Its eyes are yellow with black pupils. It wears a tattered "skirt" covered with Egyptian hieroglyphs and it carries around a staff with a large, blue gem at the top. Its tail is around seven feet long and it has two long spikes at the end.
Due to Anubyss living in another dimension, it has never been studied. But according to legend, one head was calm and stoic - this head was said to keep an eye on the souls in their control. The other head was to said to be aggressive and spiteful - this head decided on the punishments for the lost souls.