Tekkonkinkreet
鉄コン筋クリート (original)
Two penniless orphans, Black and White, struggle to survive on the mean streets of Treasure Town. When a megacorporation threatens to tear down the town to build an amusement park, Black and White engage in the fight of their life.
Starring Kazunari Ninomiya, Yûsuke Iseya, Yu Aoi, Kankuro Kudo, Min Tanaka, Rokuro Naya, Tomomichi Nishimura, Mugihito, Nao Omori, Yoshinori Okada
It's a action & adventure and animation movie, and has a rating of 7.5 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from United States.