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

Images from the Smash Bros 64 event, Slamfest '99, have been uncovered

In 1999 Nintendo Had A Real-Life Wrestling Match Starring Mario And Pikachu

Sandy Cheeks, Universe of Smash Bros Lawl Wiki

I found photos in my old computer of the making of/rehearsals of Slamfest 99! : r/smashbros

Slamfest '99 aka Super Smash Bros. LIVE (lost livestream of promotional event for Nintendo 64 crossover fighting game; 1999) - The Lost Media Wiki

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Super Smash Bros., Smashpedia

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

I found photos in my old computer of the making of/rehearsals of Slamfest 99! : r/smashbros

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

Slamfest '99 aka Super Smash Bros. LIVE (lost livestream of promotional event for Nintendo 64 crossover fighting game; 1999) - The Lost Media Wiki