Remember, kids: Smash is a Party-FIGHTER. Party game first, sure, but it’s a fighting game, too.

Smash Bros, Melee, and Brawl, while they can be played competitively (pretty much any game can), where not envisioned or intentionally designed to be played in such a manner.
Super Smash Bros for 3DS/Wii U is the first Smash game that was designed to be played competitively, as evidenced by For Glory, Omega forms, smooth landing and anchor jump gear.