Typhlosion Trainer
Fire Trainer
I don't think we will even see pidgeot. It's too late to touch upon that and what would ash do with it? He would oak it! so it's much better off with the pidgey's and pidgeottos.
Now that I think about it, your right. I just say if one of them was seen again, it would probably be Pidgeot instead of Butterfree.