Major appearances
A Watchog debuted in A Night in the Nacrene City Museum!, under the ownership of Lenora. This also marked the species' debut. It first used its Illuminate Ability to reveal Yamask's presence. It then battled Ash in a Gym battle in The Battle According to Lenora!, where it defeated his Oshawott with Thunderbolt. It appeared again in Rematch at the Nacrene Gym!, where it was defeated by Oshawott's Aqua Jet.
Three Watchog appeared in Emolga and the New Volt Switch!. They resided in an apple tree, and attacked Emolga, Axew, and Oshawott when they tried to retrieve some apples for Emolga. However, they enraged a Simisear in the process, and were scared away by its Flamethrower.
A male Watchog appeared in Cilan Versus Trip, Ash Versus Georgia!, under the ownership of Jimmy Ray. He lost to Iris's Emolga during the first round of the Club Battle after he was hit by Attract and then Hidden Power.
A Watchog appeared in Evolution by Fire!, under the ownership of Kylan. It battled Shamus in a Double Battle along with a Mienshao, but both were defeated.
A Watchog appeared in Curtain Up, Unova League!, under the ownership of Mikael. It battled Bianca's Emboar during the qualifying round of the Vertress Conference, and lost in the next episode.
A Watchog appeared in The Pokémon Harbor Patrol!, where it was a member of a rescue team managed by a harbor patrolman named Halsey. While originally used only for crowd control and as a lookout, Watchog, with the help of N, proved itself to be a capable and valuable asset to its team.
A Watchog appeared in Cilan and the Case of the Purrloin Witness!, under the ownership of Mrs. Ripple. She used it as a guard to watch over her jewels.
Minor appearances
A Trainer's Watchog appeared in Iris's flashback in Iris and Excadrill Against the Dragon Buster!.
Two Trainers' Watchog made cameo appearances in Cilan Takes Flight!.
Multiple Watchog appeared in Climbing the Tower of Success!, with one under the ownership of a Trainer and the rest being wild.
A Trainer's Watchog appeared in Rocking the Virbank Gym! Part 1, where it was revealed to have lost to Roxie in a Gym battle.
Multiple Watchog appeared in Kyurem VS. The Sword of Justice during the Swords of Justice legend.
A Trainer's Watchog appeared in Jostling for the Junior Cup!.
A Trainer's Watchog appeared in Strong Strategy Steals the Show!.
A Trainer's Watchog appeared in Cameron's Secret Weapon!.
A Watchog appeared in Meowth, Colress and Team Rivalry!.
A Watchog appeared in Genesect and the Legend Awakened, under the ownership of some Workers in New Tork City. It was keeping watch next to some roadworks.
A Trainer's Watchog appeared in The Journalist from Another Region!, where it was entered into the Pokémon Sumo Tournament on Harvest Island. It was eventually defeated by Ash's Pignite.
A Watchog appeared in Kalos, Where Dreams and Adventures Begin!.
A Watchog appeared in Grooming Furfrou!.
A Watchog appeared in The Bonds of Evolution!.
A Watchog appeared in a flashback or a fantasy in The Forest Champion!.
A Watchog appeared in A Fashionable Battle!.
A Watchog appeared in Party Dancecapades!, under the ownership of a Pokémon Performer participating in Monsieur Pierre's dance party.
A Watchog appeared in a flashback in A Watershed Moment!.
A Trainer's Watchog appeared in A League of His Own!.
Multiple Watchog appeared in Volcanion and the Mechanical Marvel. One appeared during a flashback, while another was a resident of the Nebel Plateau.
A Trainer's Watchog appeared in Battling With a Clean Slate!.
A Trainer's Watchog appeared in The First Day of the Rest of Your Life!.
Three Watchog appeared in Till We Compete Again!, each under the ownership of a different Trainer.
Pokédex entries
Episode
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Pokémon
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Source
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Entry
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BW014
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Watchog
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Ash's Pokédex
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Watchog, the Lookout Pokémon, and the evolved form of Patrat. Watchog's body contains luminescent compounds, which allow its eyes and stripes to glow.
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BW115
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Watchog
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Ash's Pokédex
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Watchog, the Lookout Pokémon. The markings on Watchog's body can glow to intimidate its foes. It has excellent vision, even in darkness.
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