https://www.cnet.com/news/everything-you-need-to-know-about-pokemon-detective-pikachu-ryan-reynolds/

The movie centers on the search for a human detective named Harry Goodman who goes missing, prompting his son Tim to find out what happened.

Helping Tim in the investigation is Harry's former Pokemon partner, Detective Pikachu -- described as "a hilariously wise-cracking, adorable super-sleuth who is a puzzlement even to himself."