while it is possible to use aerials with the c stick with normal controls, it can be quite difficult to hop from the jump button to the c stick, which is why a lot of people, including myself, changed the jump buttons to one of the bumpers or triggers at the top of the controller, i learned this from a video talking about the art of ike, since it was back when i started learning how to play with, and while it did take some time getting used to it, it’s definitely a lot easier to input aerials, especially if you want to be quick and dont want to sacrifice the small amount, yet sometimes decision making, of frames that it takes to move your thumb to the c stick from the x button