this video made me realize that all final smashes can be categorized into 4 types
1: Cutscene, usually takes all players out of the match to watch a short 5 second video on what's happening, doesnt usually kill until the last hit 2: Flurry, stays within the bounds of the stage, has a large active hitbox for a few frames then hits the enemy with a bunch of strikes, finishing with one that actually kills 3: Real time, stays within the bounds of the stage, usually a massive hitbox that is constantly active, can kill before dealing major damage 4: Screen Wipe, the least common, also stays within the stage, and has a character hitting almost the entire stage, also tends to kill prematurely
there are a few notable exceptions to these (most notably bayonetta, who starts in real time but ends with a cutscene, pyra/mythra, who starts with a cutscene and enters real time, and kazuya, who does the same thing, these weirdos are classified by what they start with)
that being said, here's the list (not counting echo fighters except ken cause ken and ryu are also weird scenarios, both final smashes are counted)
Cutscene: 28 Flurry: 15 Real Time: 34 Screen Wipe: 8
Fun fact: over half of the cutscene final smashes comes from characters introduced in smash ultimate
Only a few characters have unique detail on stamina mode. First, if Joker finishes the fight with the final smash, the final scene of the final smash stays while the GAME word appears. Second, when Terry dies in stanima mode he loses his cap. And third and last, Sora's unique cinematic for finishing the stanima battle.
Really makes them feel like a finisher