Mewtwo looks down before it looks at the tablet. It does not blink. It does not emote. It just stares for a moment, unsure what to really think about this whole scene because it already expressed (1) emotion about it- faint amusement. That's a weird one, too.

"I am pleased to know that you exist at all. I have seen things since my lantern became dysfunctional that were not real."