[...Judging from the look on Pansage's face at that, it probably prefers being small enough where people wouldn't try to ride on it's back. (Plus being small allows us to ride on other people instead!)]

Maybe we'll consider the offer if we should ever come across one of those here. [Which is probably never, but...telling a kid that seems mean.] ...Oh, I don't think I properly introduced myself. I'm Cilan, a Pokemon Connoisseur. And you are?