Ben 10 Ultimate Alien - 2010 Couples Retreat 2-26 was released on:
USA: 18 February 2012
Ben 10 Ultimate Alien - 2010 Ultimate Aggregor 1-10 was released on: USA: 10 October 2010
even we do not know.
THE best alien of ben-10 ultimate alien is alien x.
it is not known if there is an ultimate alien yet.
Ben 10 Ultimate Alien - 2010 Moonstruck 2-11 was released on: USA: 22 April 2011
Ben 10 Ultimate Alien Cosmic Destruction - 2010 VG was released on: USA: 5 October 2010
Ben 10 Ultimate Alien - 2010 The Purge 2-13 was released on: USA: 16 September 2011
Ben 10 Ultimate Alien - 2010 Perplexahedron 1-15 was released on: USA: 5 November 2010
Ben 10 Ultimate Alien - 2010 The Creature from Beyond 2-7 was released on: USA: 2011
its either Ultimate Humoungousaur or Ultimate XLR8. EDIT BY UNDEADAWE: XLR8 cant go ultimate, lol. Anyways, Ultimate Ben is the best, fact, not opinion.
Ben 10 Ultimate Alien - 2010 The Perfect Girlfriend 2-18 was released on: USA: 21 October 2011
Ben 10 Ultimate Alien - 2010 The Big Story 2-4 was released on: USA: 4 March 2011