One of many Poverty Row jungle films, this has to be one of the truly "so bad it's good" films of its era. A Chief Native Bearer named "Mumbo Jumbo" -- addressed by the other actors with a straight face! Pongo is a white gorilla, and one of the natives points to the ground and cries, "B'wana! B'wana! Pongo tracks!" Normal gorillas leave recognizably different tracks? Pressing through the jungle on their trek, they pass the same tree multiple times.
I have a copy of the film on videotape. One of my favorite scenes was edited out of the print it was made from. The hero and heroine are drifting down the river on a boat. They're sitting in the moonlight, and Pongo is following the boat in the jungle, making quite a racket as he snaps small trees, hurls aside boulders, and rustles through the underbrush, to keep up with the boat. He's framed by the profiles of the hero and heroine, in the background. The hero looks deeply into the heroine's eyes and says, dreamily, "Quiet out here in the river, isn't it?" I hope the DVD has that one left in.
This is not a great film, and all of its humorous scenes are intended to be serious. But because of that, it's a fun film.