Movie released around the late 90s about a boy who moves from a village with his mother to live with his father in America

Is it Jungle 2 Jungle or Un indien dans la ville?

It is not LA, but New York City and there is no reporter.

But it is Amazonas related, there is a 13-year old boy and:

Michael's fiancée, Charlotte, is less than pleased about the unexpected visitor in a loin cloth outfit, who tries to urinate in front of her at a fake tree (as is usual in his tribe), suggests eating her cat, and releases Maitika, his enormous pet tarantula in her apartment.

You may check the film at Youtube