In certain private trackers, users add personal tags like ac (maybe initials) and best as a personal rating. Example:
La.Guerra.de.los.Mapaches.de.Pompoko.DVDRip.AC3.best.x264.mkv
If so, it's just a renamed Ghibli film.
Some content farms or video aggregators generate nonsense titles with popular keywords (raccoons, war, DVDRip, best) to attract clicks. The phrase might be synthetically generated. la guerra de los mapaches de pompokodvdripac best
If you are certain the phrase is correct as typed, here are other plausible avenues: In certain private trackers, users add personal tags