The Nashtah Pup was the biggest "woah moment" for me in wave 7. Big props to FFG for throwing in this little curveball.
I'm guessing there will be two cardboard inserts for Z-95 with name and pilot skill for each YV-666 pilot. Certainly pilot skill seems to carry over to the Nashtah Pup. Not certain is if pilot ability will continue. I say it is unlikely because it would severely limit design space. Bossk seems OK in a Z-95 but most pilot abilities tie in with a specific ship.
Can you fly Bossk in the Pup right at the start of the game? My guess is no because costing would be problematic. The Nashtah Pup card seems to imply that there will not be a separate Z95 card for each pilot. No card means no point cost for the Pup on its own.