From Bulbapedia, the community-driven Pokémon encyclopedia.
Looker showing his International Police badge
The International Police (Japanese: 国際警察 International Police), also referred to as the Global Police in Generation I and III, is a law enforcement agency in the Pokémon world. Its most notable member is Looker.
In the games
In the Generation I games and Pokémon FireRed and LeafGreen, an International Police officer appears on the S.S. Anne undercover (using the overworld sprite of a Gentleman) and in pursuit of Team Rocket. Here, the group is referred to as the Global Police.
Looker, a member of the International Police, has appeared in Pokémon Black, White, and Platinum.
In Pokémon Platinum, he appears at various points in the story to help the player, while he himself is on the trail of Team Galactic. After Team Galactic's boss, Cyrus, disappears into the Distortion World, Looker refocuses his investigation on Charon, who he successfully arrests at Stark Mountain.
In Pokémon Black and White, he is attempting to arrest the Seven Sages of Team Plasma. He appears in the player's house, requesting their help to find the sages.
In the anime
The first appearance of the International Police in the anime was in Frozen on Their Tracks!, when Looker debuted. However, he did not reveal that he was an International Police agent until Gateway to Ruin!, where he was spying on Team Galactic disguised as a Galactic Grunt, who were trying to locate the Spear Pillar.
In Unlocking the Red Chain of Events!, Looker infiltrated the Fuego Ironworks disguised as a Galactic Grunt in order to find out what Team Galactic was doing there. Despite this, he was discovered and thrown in a cell until Ash and his friends rescued him. By this time, Team Galactic had already fled but Looker found a piece of the Red Chain. Taking it back to the Floaroma Police Station, the Floaroma Police set up a live transfer of the scanned data to International Police HQ. However, the piece had been engineered by Charon to blow up the scanner and wipe all data from the International Police database.
In In The Battle Finale of Legend!, Looker arrested all Team Galactic members.
Looker was set to make a comeback in two unaired episodes investigating Team Rocket and Team Plasma in the Unova region, before they were indefinitely postponed.
In the manga
All the appearances of the International Police in the manga are made by Looker.
In the Pokémon Adventures manga
Looker appears as a character in the Diamond & Pearl and Platinum chapters, where he assists Platinum in searching for information on the Distortion World. In this canon, it is explained that the International Police goes around the world to search for villains. He later appears in the Black & White chapter, where he entered the Sinnoh League to investigate a participant that he thinks may be related to Team Plasma. Looker has many items he calls the "International Police arms". Many of these gadgets are cheaply made and have a tendency to fall apart at Looker's expense but will occasionally work for him when the time is needed.
The Excellent Scope: A pair of goggles that fall apart.
The Invisible Cloak: A cover that doesn't hide Looker at all.
The Variable Rope: A zip-line.
The Protect Rock: A rock that can be used a shield.
The Galactica Jet: A jet that tends to explode.
The Vs. Recorder: Not an actual arms, but Looker often calls his other items one.
The Hyper Compact One-touch Tent: A tent that collapses on itself over time.
The Grateful Umbrella: A weak umbrella that easily breaks apart in the rain.
The Loudful Speaker: A powerful speaker that sends the user flying backwards.
The Super Hard Tight Tape: Powerful tape that is used to quickly tie up an enemy.
The International Satellite Smartphone: A phone that Looker uses to receive calls from his superior.
The Unbelievable Metamorphosis Set: A mask used to hide Looker's face.
In the Pokémon Diamond and Pearl Adventure manga
Looker also appears in Pokémon Diamond and Pearl Adventure!. Another member of the International Police is Koya, who works with Looker on the trail of Kaisei. Kaisei is currently on the run from the International Police and is being pursued by Looker and Koya. Trained in disguise, they use this skill to capture Charon.