Cowa!

Paifu, a half-vampire half-werekoala, is always getting into trouble with his best buddy, José the ghost. But when the Monster Flu sweeps through town, the fun and games are over. If the monsters don't get the medicine soon, everyone will die! With all the adults sick, it's up to the kids to save the day! Paifu and José are off on a big adventure, but will they get the medicine in time...or will they become victims themselves?! (Source: VIZ Media)

Cowa! was published in English by VIZ Media under the Shonen Jump Manga imprint on July 1, 2008, and later digitally on October 22, 2013.