I would recommend at least writing up the other first before reserving another one. However, if Cryogonal is finished before you write up the other, you may reserve another one. Since the priority list is pretty short, and most of the RU-viable NU Pokemon have been added to the list, I'm gonna have to stick with this format so everyone has a chance to contribute, instead of a few people grabbing as many as they can.
EDIT: It looks like CP finished his GP check, so once you implement that you may reserve another one.