Shine spike
The shine spike is one of Fox's edge-guarding techniques. It consists of using Fox's down B to spike an opponent who is already off of the stage down and away, to prevent their recovery. Note that the term 'spike' is used loosely here, because it is not technically a spike, but what many like to call a 'pseudo-spike'. This is because it doesn't send the opponent straight down, but rather, at an angle to the side. Theoretically, Falco's Down B from Melee could also work. Other infamous pseudo-spikes are Link's Spin Slash and Peach's D-smash. Other lesser known Shine Spikes include Captain Falcon and Ganondorf's Neutral Aerial attacks, and Jigglypuff's Up Aerial. They are most likely lesser known because they do not work as well, (specifically Ganondorfs, as he is heavy and falls faster than many opponents).