Pokémon Ruby-Sapphire

Pokemon Pocket Monsters stars a Pokémon Trainer named Isamu Akai (nicknamed "Red") and his rude Clefairy. It is chiefly a gag manga, using crude humor and slapstick
In a world filled with talking Pokemon, Red and Green compete with each other in a race to gather all the data needed for the new Pokedex! Bumbling Clefairy frustrates Red with its extreme incompetence and silly behaviour... however, sometimes Clefairy's bizarre ideas to work out in the most surprising ways!!
(Sources: Bulbapedia, Chuang-Yi)

The plot follows the adventures of Isamu Akai and his Pokémon (Clefairy, Pikachu and Tyrogue) in Sinnoh. It is chiefly a gag manga using crude humor and slapstick.