Pocket Monsters D-P (Diamond and Pearl)

In this new Pokemon series ( Ruby-Sapphire), Clefairy will make you laugh hilariously! Accompanied by Red, Clefairy meets with all sorts of problems on its travels entertained by all the silly ideas it comes up with to solve them!!! 
(Source: Chuang-Yi).

The plot follows the adventures of Isamu Akai and his Pokémon as they go back to Johto. It is chiefly a gag manga using crude humor and slapstick. 
(Source: Bulbapedia)

Most kids spend their days at school, but not Hareta. Raised in the wild by Pokémon, he can climb as high as an Aipom, swim as fast as a Magikarp, and even eat bark like a Bidoof!

Recruited by Professor Rowan, Hareta decides to become a Pokémon Trainer. Along with his first Pokémon, Piplup, and his new friend Mitsumi, he sets off in search of the legendary Pokémon Dialga. But Team Galactic is hunting for Dialga too. Can Hareta and Piplup defeat Team Galactic and stop their evil plans?

(Source: VIZ Media)

Included side stories:
Volume 3 - Deoxys, The Phantom Pokémon! (Part 1); Deoxys, The Phantom Pokémon! (Part 2)
Volume 4 - The Tale of Hareta and Shaymin
Volume 6 - Mitsumi's Wish
Volume 7 - Return to Hareta's Home Forest!
Volume 8 - Hareta's Future