MultiVersus while being an okay fighting game is so grindy that unlocking all smash ultimate characters is faster. The game lags in menus, everything is extremely overpriced, the single player wants you to play each level five time at least, but you need to grind gems which is different from the 4 separate currencies in the game, occasionally you are matched with bots in online games. All this is not worth an alright fighting game

Here is are some of the 2D platform fighter that you could play instead
Super Smash Bros.
Super Smash Bros. Melee
Super Smash Bros. Brawl
Super Smash Bros. For 3DS
Super Smash Bros. for WIIU
Super Smash Bros. Ultimate
Rivals of Aether
Rivals of Aether 2
Cartoon Network: Punch Time Explosion (has IP overlap)
Brawlhalla (also free)
Nickelodeon All Star Brawl
Nickelodeon All Star Brawl 2
Nickelodeon All Star Brawl
Digimon Rumble Arena
Digimon Rumble Arena 2
Battle Stadium D.O.N
Teenage Mutant Ninja Turtles: Smash-Up
Fraymakers
Slap City
BaraBariBall
Brawlout
Dimensions Vs
Earth Romancer
Icons: Combat Arena
Fullmetal Alchemist: Dream Carnival
Indie Pogo
Kung Fu Panda: Showdown of Legendary Legends
Super Smash Flash (free)
Super Smash Flash 2 (free)
Project + (free)
Project M (free)
Super Smash Bros. Crusade
Super Slav Brothers (free)
Roof Rage
Project Tussle
Megabyte Punch
Playstation All-Stars Battle Royale
Lethal League
Jump Super Stars
Indie Game Battle
Indie Assault