Is this copying or getting influenced? When I build a world or create a character I always try to make it original. But when I look at it after I’m done it seems like a carbon copy of a known character. 

Recently I wrote a character which has the ability to shape shift. He was built on a lab and gained personality. Then he escaped. His ability to shifting different creatures activates when he is in danger. Like when some punks attack him his skin shifts into stone and his skeleton gets bigger making him an entirely different species(Stonate) So when i came up with the idea i thought it was original enough and cool in some ways. Then 1 day later i figured he was a carbon copy of ben 10. Which i havent been watching regularly since i was 11. Is this getting influenced or my brain just cannot make something original and steals from memories?