buddy movie 
noun informal, chiefly North American
A film portraying a close friendship between two people.Good-natured, hopeful and well-intentioned, the French film Monsieur Ibrahim is the sort of bittersweet coming-of-age buddy movie that will undoubtedly fare well with bourgeois art-house audiences the world over....
- It is at once a coming of age story, a rite of passage, a road trip and a buddy movie.
- The series is really an extended buddy movie, set in hip Manhattan bars and not in muddy trenches.