Anodyne is the homeworld of the Anodites.
When viewed from space, Anodyne is a dark red planet with four orange rings.
Ben 10: Alien Force
In What Are Little Girls Made Of?, Anodyne was seen in a flashback. Verdona wanted to take Gwen to Anodyne to train her. In the end, Gwen decides to remain on Earth with her friends and family.
Ben 10: Ultimate Alien
In Girl Trouble, Sunny is sent from Anodyne to Earth as a method of preventing her dating Antonio. She is later taken back to Anodyne by Verdona.