Hold the pass button and aim to the teammate near the rim
On PlayStation, press Triangle + Circle
On Xbox, press Y + B
On Nintendo Switch, press X + A
Use a player with good passing and dunking attributes
Make sure the teammate is cutting toward the basket
Trigger the alley-oop in transition or on a fast break for better success
Use the right stick to control the pass direction if needed
Time the pass when the receiver is close to the hoop
Practice the timing in 2KU or practice mode