When Pikachu and Tim go to the underground Pokemon Arena, they are immediately spotted by Ms. Norman, who sends a message to someone:
Eventually revealed to be Howard Clifford, revealing that Ms. Norman is Howard's Ditto.
One of the themes of the movie is that Pokemon and humans are not able to communicate, the Pokemon can feel what the humans desire and try to act on it. But in this instance, we clearly see that Ms. Norman (a Ditto) can communicate, at least via written language. Is this some special exception for Dittos, or a goof on the part of the film makers?