Zahra knows that Katsuya knows that they know that he's lying. But you know what?

They'll it drop. It's clear that he doesn't want to talk about it, and they aren't nosy enough to bother him about it.

"Well, thank you, Kaseri. Without you, I'm pretty certain I would've been Monster Mash'd into the hospital." Fishing an Oran Berry out of their bag, Zahra presents it to the Ponyta, smiling. "Here!"