Tournament:Mainstage

Mainstage was a Super Smash Bros. Melee major and Super Smash Bros. Ultimate supermajor tournament held in Ontario, California, from September 20th-22nd, 2019. It was Beyond the Summit's first major Smash tournament that is not a tournament. The top 6 non-invited players for Ultimate also qualified for. A live roast of took place before Melee Top 8.

Super Smash Bros. Melee singles
(289 entrants) Top 64 Bracket Top 16 Bracket

Super Smash Bros. Melee doubles
(48 teams) Top 16 Bracket

Super Smash Bros. Ultimate singles
(273 entrants) Top 64 Bracket Top 16 Bracket

Super Smash Bros. Ultimate doubles
(36 teams) Top 16 Bracket

Trivia

 * defeated 3-1 in losers' top 16, marking the first time he has ever taken a set off Mango.
 * This is tied with for 's and 's lowest placements in an Ultimate tournament, with placements of 13th and 33rd respectively.
 * and were scheduled to play a tiebreaker for the 6th qualifying spot for, but Salem decided to not play the tiebreaker and gave MuteAce the spot for free.