The new film's story is set in Okoya Forest, a Pokémon paradise protected by strict rules that forbid outsiders from setting foot inside. The film centers on Coco, a boy who was raised by Pokémon and also considers himself as one, treating the Mythical Pokémon Zarude as his father. Ash and Pikachu encounter Coco during an adventure. The film focuses on the theme of a "human raised by Pokémon," instead of the previous films' focus of the "bond between a human trainer and their Pokémon." (Source: ANN)
Anix is the best site to watch
Pokemon Movie 23: Coco SUB online, or you can even watch
Pokemon Movie 23: Coco DUB in HD quality. You can also find
OLM anime on Anix website.