Is there any Smash Bros. characters you didn't know about before their Smash Bros. reveal? (or well before you picked up the game).
A lot of the characters in Melee I didn't recognize when I first played it. Other than the Pokémon, Kirby, the Mario and Mario adjacent characters (aside from learning a "Dr. Mario" exists, but I mean, it's simply Mario as a doctor), and knowing a "Zelda" exists and recognizing Link while not knowing his name (yet never thinking he was "Zelda"), I was in the dark.
After that, I'd follow Smash stuff since Brawl was announced, so other than not recognizing Pit right away (but thinking back to the Melee trophy) and learning about the Zero Suit's existence through the trailer, I at least seen each of Brawl's newcomers at least once. Even Lucas, who had come up a few times in speculation but people talked about Masked Man more.
Even Snake, I at least recognized through Nintendo Power, so the big shock for me with him was that he wasn't a Nintendo character.
Wii Fit Trainer is someone I didn't know existed before a friend sent me a clip of her reveal through text (didn't see it live). Other than her, I knew of all other Smash For newcomers to varying degrees.
None of Ultimate's newcomers were anyone I haven't at least seen before somehow.
The closest one I didn't know of was Richter since I wasn't that versed in Castlevania. But it made a lot of sense when it was clear he was the "Die, monster!" guy since I'd seen that scene passed around.