I've found... something, in the Dungeon Hints -> Controls section of the menus. The first six instructions are yellow. I'm guessing this is one of these password hints, but it's still fairly obtuse to me.
Well, I've finished the first half of the game. The added features and Pokémon are nice, but sometimes the difficulty feels more like... vague, I guess, than really something testing my knowledge. But it's hard to make this genre feel fairly challenging compared to others, I think.