The Dam Keeper (2014)

IMDB
Genre : Animation, Family, Fantasy
TRAILER
Director : Robert Kondo, Daisuke 'Dice' Tsutsumi
Stars : Lars Mikkelsen, Courtney Lockwood
Plot : A little pig, who keeps his town safe from a cloud of pollution with his windmill dam, is ignored by a thankless public and bullied at school. When a new kid arrives, things begin to change.