Super Smash Bros. (64) in competitive play
The original Super Smash Bros. getting competitive play did not start at the initial release of the game, unlike all of its successors. In fact, the first Smash Bros. did not develop almost any community at all until Melee came along two years later as a breakout sequel. Only then did the newborn Smash tournament scene have small groups of people take a second look at the 64 version.
Early years
The first offline Smash 64 tournament that could be considered a national was FC Diamond, held in 2007, because it featured a larger than normal influx of players and spectators alike.
Today
Smash 64 is still a fairly small competitive scene, being the smallest out of all of the Smash games, with the largest tournament Super Smash Con 2016 gathering only 314 entrants. The small pool of active players that attend tournaments mean that only a few players (such as wario and SuPeRbOoMfAn dominating the scene completely.