"It's very fickle."

Drawing out the 'very' just slightly, it's a guess to how she'd finish that sentence - although a pretty good one. He didn't miss the feed that explained that incredibly big owl she'd had when he ran into her last ... he saw it much later, of course, but he did, and it wasn't very difficult to understand the sitaution. Besides, people disappearing is always a relevant topic in Johto.

(He's still feeling the loss of the ponies, somewhere. It saddened him much more than he'd expected.)