I think they want to send us back, and... you know, I don't who the ones are that actually bring us here. Uh... it's been a while since I read the journal.

[ He feels like he's confusing himself when he explains it, but it seems... right? Did the book even say about that? Jack didn't ask about who brought them there, but it did pop up in his head. Er. Anyway, as for about Pikachu- ]

Pikachu can talk, but not to us. [ Pikachu waves out a paw in greeting, and chirps a small sound. Piiii. ] He can talk to other pokémon like him -- like animals from our world.

[ Because that's a thing worth point out, in case Jack thinks they all look like Pikachu! Can't be having that. ]