Pocket Monsters DP  

Pocket Monsters D-P (Diamond and Pearl), Pokémon Diamond-Pearl, Pokemon DP, ポケットモンスターD・P（ダイヤモンド・パール)

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.(Source: Bulbapedia)