No video footage survived of the Slamfest '99 Super Smash Bros

The year was 1999 and recording was by no means as simplified and widespread as it is today, but Nintendo's Super Smash Bros. 64 promotional event in Las Vegas was indeed recorded, in fact, it was actually broadcasted live

Lost Smash Bros. Slamfest '99 Photos Put Pikachu, Mario, and Yoshi in a Real-Life Ring - IGN

Lost Smash Bros. Slamfest '99 Photos Put Pikachu, Mario, and Yoshi in a Real-Life Ring - IGN

New Photos from the Lost Super Smash Bros. Slamfest '99 Event Have Emerged : r/nonmurdermysteries

Super Smash Bros. LIVE - The Lost Promotional Event (Slamfest '99)

Super Smash Bros. (video game) - Wikipedia

Super Smash Bros. (1999) - MobyGames

No video footage survived of the Slamfest '99 Super Smash Bros. wrestling event, but these photos just surfaced

Super Smash Bros News

Super Smash Bros., Smashpedia

Super Smash Bros. (1999) - MobyGames

EventHubs fighting game news and tournament results

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User blog:RottenPumpkinGamesALPHA/Super Smash Bros. Intergalactic, Fantendo - Game Ideas & More

The Road Theatre: Under Construction – New Play SLAMFEST 3