Detective Pikachu (Nintendo Cinematic Universe)

Detective Pikachu is a Japanese anime film.

Summary
A boy works with a talking Pikachu to solve various mysteries.

Plot Elements

 * One day, a peculiar talking Pikachu, who claims to be a great detective, encounters a boy named Tim Goodman, who is able to understand what he is saying. They are immediately put to the test with retrieving a stolen necklace from thieving Aipom. Afterwards, they head to Baker Detective Agency and meet Mike Baker and secretary Amanda Blackstone, both of whom were close to Harry Goodman, Tim's father and Pikachu's owner.
 * Harry had gone missing following a mysterious car crash that happened the same time Pikachu got amnesia.
 * Tim and Pikachu deduce that Harry was last seen trying to investigate Litwick Cave, and arrive just in time to rescue GNN reporter Meiko Okamoto and her assistant Emilia Christie from a rampaging Glalie, who seems to not remember why it was attacking to begin with.
 * After escaping, Tim and Pikachu trace a clue to the Pokémon Comprehensive Laboratory. Posing as interns, they are introduced to the staff and are reunited with Emilia and Meiko, who together end up having to solve another rampaging Pokémon incident. They learn that employee Carlos Hernando had created a drug called "R" and has been using it to induce the rampages. After his arrest following an attempt to use R to chase them off, they learn that R was actually created by Dr. Waals, who now lives on Cappucci Island, but upon arriving learn that he is under arrest by overzealous lieutenant Brad McMaster for a supposed dangerous Pokémon that has been attacking the native wildlife. With Tim and Pikachu's help, they catch the real culprit, a tourist director who just wanted to possess Dr. Waals' home, and clear Waals' name.
 * Waals reveals that R was supposed to be a miracle drug using the DNA of Mew, but by mistake the DNA came from Mewtwo, who has a "berserk gene" that causes the rampaging Pokémon.
 * At Waals' advice, Tim and Pikachu head to the abandoned Fine Park where the first rampage occurred with a Charizard.
 * The native Pokémon bring forth a locket that belonged to Harry and learn from a Buneary that a Skorupi had attacked him, resulting in him crashing his car.
 * Tim and Pikachu head to the GNN building to meet with Meiko about the Fine Park footage of Charizard's rampage. When she leaves to go get it, Tim and Pikachu get involved in another mystery involving a down on his luck comedian trying to steal a violin from a competitor from a show he's hosting. They finally get to see the footage and discover that GNN assistant director Keith Norman had used a Skorupi to release R on Charizard at the park.
 * Found out, Keith makes his escape on a Noivern, but Pikachu discovers that the locket left by Harry is actually a hidden camera full of photos taken from Ryme Wharf.
 * Upon arriving, Tim and Pikachu spot a couple of shifty wharf employees and realize that they are keeping Waals' former assistant Simon Yen prisoner, and have been forcing him to mass-produce R.
 * Pikachu suddenly remembers that he made a promise to Mewtwo to stop the creation of R, and Yen sneaks Tim and Pikachu onto the S.S. Prime Treasure, where R is apparently being sent. By coincidence, they run into Emilia and get caught up in another side mystery involving a stolen mask. Afterwards, they learn that a secret black market auction is happening and take part in it, discovering that Keith is there trying to sell R. They manage to catch him.
 * As Tim and Emilia have a moment, Pikachu speaks privately with Mewtwo, who reveals that his promise is not over and that he still needs him to get rid of his cells. After looking through Keith's things they learn he is working for someone at GNN, and that they plan to release R during the Pokémon carnival.
 * Tim, Pikachu and Emilia race back to the Baker Agency to inform them about the clues they have gathered. Realizing that the culprit plans to release R at Central Square during a parade, the group split up to look for clues. They capture and arrest a mysterious man in a yellow hat, but realize that R will be distributed from the clock tower, and find a large machine that they are able to successfully disarm. At that point, they realize that the culprit is GNN boss Roger Clifford, due to him mentioning that Pikachu does not have powers (something that only Keith knew).
 * Roger reveals himself with Emilia as his hostage. He explains that he wanted to use R as a way to report on its disaster in Ryme City, making GNN more powerful and leading to them having total control of information.
 * Tim and Pikachu rescue Emilia and defeat Roger and his Noivern.
 * As Roger is taken away, Pikachu meets with Mewtwo to return the last of his cells. Pikachu then "makes a decision" and is put to sleep by Mewtwo. The next morning, Tim and Pikachu set off to look for Harry.