Board Thread:Questions and Answers/@comment-2107156-20171112120432/@comment-28802873-20171112150303

Theory: the Omnitrix was progressively getting erased, it's just that landing on No Watch Ben's wrist prevented it from disappearing since it bonded with someone from a different universe. As for Vilgax, the Chronosapien Time Bomb destroyed all the different 'Bens' having an Omnitrix (inclusing Gwen and Albedo) and the universes they belong to, but maybe because Vilgax was out of his universe it simply didn't affect him?