FusionDex.org

If you discover large caverns or deep tunnels lacking all shiny minerals and jewels, these incredibly rare Pokémon have likely passed through previously. Sablnix seek out these materials to consume, eventually causing their bodies to glitter, too.

There is a magnet in its brain that prevents an Sablnix from losing direction while tunneling. It digs branching holes in caves using its sharp claws in search of food--raw gems.