Where should my poochon puppy sleep?

I'm tempted to say "in a pouch," but really, in a crate in your room. Crates provide security and take advantage of the denning instinct, and the instinct to keep the den clean. And you don't want it pooping and piddling all over your room. it will have just left its littermates and so will be extremely lonely -- don't make things worse by putting it by itself.