Final Fantasy Mystic Quest/Controls

Control Action
D-Pad Move Hero, change menu selection.
Start Open the menu.
A Use equipped weapon, confirm menu selection, interact with people or objects.
B Jump forward, cancel menu selection.
Y Toggle party member control status (manual/auto).
X Open the save menu.
L Toggle equipped weapon (shift left).
R Toggle equipped weapon (shift right).

The Select button is not used in this game.