Partner
Напарник (original)
A police detective is going through different adventures while he is stuck in a little boy body.
Starring Andrey Nazimov, Sergey Garmash, Elizaveta Arzamasova, Kseniya Lavrova-Glinka, Yan Tsapnik, Pavel Vorozhtsov, Alexander Petrov, Sakhat Dursunov, Evgeny Koryakovsky, Yongchang Jiang
It's a action & adventure and comedy movie, and has a rating of 4.6 out of 10 from Imdb which is fairly low for this kind of movie.
Watch it here
Not found streaming from United States.