Alien Guide (Ben 10)

When his grandpa Max goes missing, fifteen -year old Ben Tennyson locates himself back in the hero business. Strapping on his Omnitrix, which lets him to modify into different aliens, Ben teams up together with his friends Gwen and Kevin, and mutually, the three of them set out to locate Max. Along the way, they locate new half-alien allies and a new foe: the Highbreed and their DNAlien servants, who are joined by the alien arms dealers known as the Forever Knights.