If you are looking for Information about PSU Clementine, Go check their Wiki
Rappy
From The re-PSUPedia
Description
Rappies are a small, yellow, bird creature. They're a rare monster and will only appear when certain requirements have been met within a mission.
Interesting fact: Rappies have appeared throughout the Phantasy Star series, kind of like how Final Fantasy has Chocobos.
Sightings
Coming soon.