In this video (language NSFW), at 0:15, the Fox labeled "Tang" performs what appears to be a reflector followed by an up smash. The reflector animation only plays for about a frame, before the up smash comes out.
When I attempt to perform these moves in sequence, with down+b followed by up+a, the full animation of the reflector plays, and my opponent has been knocked out of range by the time the up smash occurs.
How can I quickly reflector and up smash, the way Tang does?