Below you will find all controls for Pokemon Quest available for the Nintendo Switch game console.
L and R cycle between Pokémon
Y is your left attack on selected Pokémon
X is your right attack on selected Pokémon
DPad-up is autobattle
DPad-down and B is scatter
B is back in the menus
A is select (along with ZR and ZL)
Dpad-Left and Right cycle between slides.
Source via AtomicSuperMe