The “What’s an airport?” line was pretty much the same in Japanese, but a translation error earlier in the script changed the context.
This rare dialogue between Ike’s little sister and the Black Knight reveals a shocking side of Mist. Too bad it’s nonexistent in Japanese!
Looking at the English and Japanese descriptions of the Mistwalker skill in Advance Wars: Dual Strike to find out what went wrong.
No bones about it; Russ T.’s hint is about a feature that doesn’t exist in the game at all!