Ben 10
Ben Tennyson was normal once upon a time, but not anymore. The 10-year-old boy finds a magical watch that can turn him into 10 different monsters which include 10 different abilities. Ben, armed with his new alien powers, joins his Grandpa Max and Cousin Gwen to help those in need and stop bad guys. Of course, he uses those powers for some normal kid problems as well! It aired first in 2005.