Shulk's upsmash is exactly what I was thinking of.I dont know, I was messing around with shulk and i've found at least 3 moves that hit in places they really shouldnt. For example his upsmash has side hitboxes where his sword doesnt even reach. His side smash has hitboxes extending just past the glow coming off the energy part of the sword. Its pretty crazy
Pretty annoying when you think you avoided it but still get hit.
On the other hard you have Robin with the opposite problem. I always get "hit" by the animation but manage to avoid the hitbox.