Changing the sky
In Ocarina of Time and Wind Waker, those very items gave you the power to change night into day and back again. Doing so would change all sorts of variables, be they habits of suspicious villagers or the layout of enemies on the world map. Guess what? Okami 's brush does the exact same thing. At any point you can draw a sun or moon in the sky and make the world work for you.
Above: Brush or baton, it doesn't matter - the sun obeys both tiny heroes.