Y/n Tennyson is the brother of Ben Tennyson with known as the hero of worlds during that time Y/n found himself the destroyed part of the omnitrix that ben use when he was 16 as y/n look towards azmuth the creator of the omnitrix and ask him to help him fix the old one and he accepted it and fix the old and with a few upgrades Y/n became hero 20. (And because im not copyright the 10 part so i cant be sued)
6 parts