Pokémon Horizons: The Series, known in Japan as Pocket Monsters: Liko and Roy's Departure and Pocket Monsters: The Sparkling of Terapagos, is the twenty-sixth overall season of the Pokémon animated series and the first and titular season of Pokémon Horizons: The Series, known in Japan as Pocket Monsters (ポケットモンスター, Poketto Monsutā). It was directed by Saori Den and produced by OLM. The season initially ran in Japan on TV Tokyo from April 14, 2023, to March 29, 2024, and was later distributed by the streaming service Netflix in the United States from March 7, 2024, to November 22, 2024. Daiki Tomiyasu is the executive director and Saori Den is serving as the director, Dai Satō as script supervisor, Rei Yamazaki as character designer, Conisch as music composer, and Naotsugu Uchida and Akane Yamago replacing Ryōko Nashimoto as sound editor. Bessatsu CoroCoro Comic and Gakushu Yochien are no longer credited as publishers, and Junichi Masuda and Ken Sugimori are no longer credited as creators.

The season contains two story arcs. The first arc, "Riko to Roi no Tabidachi" (リコとロイの旅立ち, lit. Liko and Roy's Departure), which serves for the first 25 episodes, focuses on the first adventures of two protagonists, Liko and Roy, who team up with the Rising Volt Tacklers to explore the Pokémon world and visit various regions, including the Paldea region, which was introduced in Scarlet and Violet. The second arc, "Terapagosu no Kagayaki" (テラパゴスのかがやき, The Sparkling of Terapagos), which ran for the remaining 20 episodes, deals with the protagonists as they research Liko's pendant, which is a Terapagos. In both of the arcs, they are pursued by the Explorers, a mysterious organization.