Spike

A spike is an attack in in the Super Smash Bros. series and Super Smash Flash series that sends an enemy downwards at high speeds. Unlike meteor smashes, spikes cannot be meteor cancelled, making them very powerful tools for edgeguarding.

In Super Smash Flash 2
Meteor cancelling was not introduced until demo v0.8a. Therefore, all meteor smashes in the demos before v0.8a were functionally equivalent to spikes.