Ele realmente pode! ... Em livros posteriores. No livro 46, A Decepção (Perspectiva de Ax):
It was decided I would morph the pilot again. A physically fit adult
male was a convenient morph for our purposes. And my own technical
knowledge would also be useful. The others would ride in my pocket as
cockroaches. After I borrowed a uniform. The laundry room was
obviously the perfect place for that.
...
Dressed and with the others in my pocket, I carefully opened the door
and stepped back into the narrow corridor.
<Okay, Ax, you’ve got to find Chapman.>
<Yes, Prince Jake.>
Observe que isso entra em conflito com o livro 8, O alienígena (também a perspectiva de Ax):
Suddenly, I heard a thought-speak message.
It was Tobias, on patrol far overhead. Of course, no one could answer
him. Humans can use thought-speech only when they're in a morph. And
since I was in a human body, I too was restricted to spoken language.
Como os livros anteriores foram escritos pela própria KA Applegate, e os posteriores foram escritos por fantasmas (e depois editados pela Applegate), está no ar quanto ao que é mais cânone.