All of a sudden, in the context of the DS, “Believe in the heart of the cards” has a different meaning.
And, unfortunately, it’s a bit difficult to believe in this one. Loosely following the newer GX series, you’re on an island, attending school every day (represented, mystifyingly, by a drawing of a completely empty, silent room). Afterwards, you drag an icon around the map, using a blippy radar to flush out prowling students hungry for battle.