Bring Gatchmon Back! Grandpa Denemon's Test!

As Haru wonders what to do, Denemon shows up and points him a way to reunite with Gatchmon.

Quotes
Eri: What's a phone booth? Haru: No idea. Asutora: I'm sure we'll know when we see it.
 * —A simple question with an obvious answer, yet Eri and Haru don't know what they're talking about.

Haru: Gatchmon, do you remember me? Gatchmon: Huh? There's no way I'd forget about you, Haru. Haru: Gatchmon! Dokamon: Eri-chan, let's defeat him~dewasu! Eri: Hmph, I thought you already forgot about me earlier?! Dokamon: Ehhh? Why would I? Asutora: Are you feeling it? Musimon: Are you not feeling it? Both: Of course we're feeling it! Rei: Let's go. Hackmon: Okay.
 * —Everyone kindly reconciles with their buddies.