You can find the Pii-chan who headed off to become a cookie-pirate on the Celestial Plain ingame in HKO. It's a dangerous area and a long way to go from Beijing.
Despite that you might want to deliver a letter to him, because he will be able to help you out later too. And maybe you wanna become a cookie-pirate as well?
In fact the "Piichans" as Sanrio invented them should be a chicken-trio: Piyo, Piko and Piipu.
The 3 of them "love to tweet" - that is how they are described on a Sanrio-webpage
