Oh, yeah? That one's a pretty big change, I guess. My Purrloin was the first Pokemon to evolve in our group, and she basically just got bigger. Didn't really prep us for how weird it could get.

[Though as far as physical changes go:]

I remember being kinda excited when I got this human body. It's a downgrade for us, and a lot of it is gross, but I dunno. [He grins.] It was just so new and interesting!