Izuku was neglected by his parents and bullied by his sister and her friends after years of neglect and abuse izuku was at the forest and wished he can be a hero then out of nowhere something came down crashing near him and it was a watch as the watch merged with his wrist izuku couldn't get it off so izuku studies it and learns it's alien technology so learning he can transform into aliens so he can be a hero without his so called family help
Izuku omnitrix
Izuku aliens
Humungasauor
Big chill
Swampfire
Cannonbolt
Wildmutt
Way big
Brainstorm
Articquana
Fast track
Heat blast
Upgrade
Four arms
Diamond head