Ken believes him, though he's very very skeptical. That was Uncle Ken for him. He had to be skeptical or he would probably derail himself. That was what Uncle Daisuke said and he was usually right about Uncle Ken's moods.

He won't say that, of course not, that's bad and rude. Instead, Kei goes on to say he needs to find more bubbles. Ken nods along like that makes sense, but of course it doesn't. Kei doesn't really care though. The Digital World doesn't make sense either.

So he sends his Plotmon to find the bubbles again. He walks with Ken who points out to him what a suspicious person looks like and to be gentle when questioning people but not inept and admits something along the line of 'don't bring your Stingmon on a hunt unless it's hostile and Kei really wants to know if that's protocol.

Then another bubble pops and he hears another voice. It's older and slower and deeper. It's hit puberty!

It also sounds familiar.

Another pops.

Are you sure you heard it over here?

Another pop.

I'm pretty sure, yes.

Why would uncle Takeru be in the bubbles?