#47: Super Smash Bros. Ultimate
My first Smash Bros. and an absolute blast.
It has a huge amount of content; tons of modes, characters, stages among other stuff. It's daunting at first. Most characters' movesets are fun and just battling with my own set of rules for hours offline is already fun to me.
Never tried online, would've likely been frustrating.
I mainly play as Bowser, Ridley or Bayonetta.
Smash Ultimate is not to complicated and rather easy to get into and it's huge amount of content guarantees that it never gets boring.
My favorite fighting game.