Spike

A spike is an attack in in the Super Smash Bros. series and Super Smash Flash series that sends an enemy diagonally downwards at high speeds. Spikes cannot be Meteor canceled by jumping while you are plummeting down, or else they are named a Meteor Smash. This is because the hitstun from a spike ends on its own, and meteor smashes cancel hitstun.

In Super Smash Flash 2
Currently, there are no spikes in the game.