Tournament:Mainstage 2022

Mainstage 2022 was a Super Smash Bros. Melee major and Super Smash Bros. Ultimate supermajor held in Ontario, California, on December 2nd-4th, 2022 as part of Beyond the Summit's open tournament series. The Top 6 players for Melee and Ultimate qualified for Smash Summit 15 and, respectively. However, Smash Summit 15 was cancelled after Beyond the Summit decided to shut down following Smash Ultimate Summit 6, making Mainstage 2022 the final Mainstage as well.

Mainstage 2022 featured the Last Chance Qualifier and The Arcadian Finals for circuit. Globally ranked players and non-United States residents were not permitted to enter the circuit, and dropping out from Ultimate singles' main bracket then participating in the Last Chance Qualifier was not permitted. Four players from each of the three online qualifiers and the Top 4 players of the Last Chance Qualifier made up the 16 players of the finals. The Top 4 of the Last Chance Qualifier was not played out. The Arcadian Finals was a double-elimination bracket, where the Top 4 won a VIP trip to Smash Ultimate Summit 6. The total prize pool for the finals was $50,000, which was the seventh-largest singles pot for an Ultimate tournament.

Due to the cancellation of the, a Melee and Ultimate supermajor planned for the following weekend, bracket registration was re-opened from November 29th-30th, 2022. All venue fees from then on were paid to Smash World Tour. Free venue was available for anyone who was registered for the Smash World Tour 2022 Championships and hadn't registered for Mainstage 2022.

Super Smash Bros. Melee singles
(389 entrants) Top 64 Bracket 1 Top 64 Bracket 2 Top 16 Bracket Top 8 Bracket * DQ'd in Losers

Super Smash Bros. Melee doubles
(58 teams) Top 8 Bracket

Super Smash Bros. Ultimate singles
(512 entrants) Top 64 Bracket 1 Top 64 Bracket 2 Top 16 Bracket Top 8 Bracket

Super Smash Bros. Ultimate doubles
(86 teams) Top 8 Bracket

Super Smash Bros. Ultimate The Arcadian Finals
(16 entrants) Bracket

Super Smash Bros. Ultimate The Arcadian Last Chance Qualifier
(448 entrants) Top 64 Bracket 1 Top 64 Bracket 2 Top 8 Bracket

Trivia

 * came on the brink of upsetting in Top 64, but would end up getting reverse 3-0'd after  switched to Sheik in the third game.
 * became the second player to defeat  in the post-quarantine era of Melee singles, following 's victory over him at.
 * Interestingly, both players accomplished this with a reverse 3-0.
 * Following a string of strong performances from the country at American tournaments, every single player from Japan competing in Ultimate singles was sent to loser's bracket before top 16, with all of them being eliminated by top 12.
 * and entered as "Batman" and "Joker" respectively. Had Marvelous_Marco beaten  in a Loser's side qualifying set of The Arcadian Last Chance Qualifier, both of them would have qualified through Loser's side.
 * This is the first major tournament where both Melee and Ultimate singles featured an Ice Climbers player in Top 8 ( and Big D, respectively). Additionally, both SluG and Big D placed in the Top 4.
 * After leaving on the afternoon of the first day of the tournament,  revealed a white T-shirt with "Free Agent" written in Sharpie in his Top 8 entrance.
 * This tournament marks the first Melee major won by a solo player in the post-Slippi era of Melee singles.