From Bulbapedia, the community-driven Pokémon encyclopedia.
Pokémon 4Koma (Japanese: ポケモン4コマ Pokémon 4Koma) is a term describing Pokémon manga that are told in four-panel comic strips, typically gag-based cartoons rather than a continuous story. Despite this, many 4Koma manga still have consistent reoccuring characters.
There are several 4Koma style Pokémon manga made by multiple different creators in different styles.
List of Pokémon 4Koma manga