The iDol (movie, 2006)

Ken is a mild-mannered man in his mid-twenties who like many his age has interests that stopped developing during adolescence. On a visit to a local toy collectors shop he acquires a rare alien action figure. Unexpectedly, Ken's world is turned inside out as the somewhat silly looking toy alters his life by benevolently giving him everything he has ever dreamed of, and then callously taking it all back...