I know I'm slightly late to this, but there are a lot of JRPG characters who could theoretically make it into smash who haven't had an official release worldwide. The biggest one to me is Aleph, who is the protagonist of SMT II, and could be included in a hero style character with the SMT 1, 2, IV and IVA protagonists, who all use a sword and a gun (although only the latter 2 use magic). The SMT 1 protagonist almost counts, but that game had an iPhone port years ago that released in english. (The if... protagonists would also work, but they're even less likely to be included).
Theoretically yes, but practically the highest aspiration for them would probably be an alt, if it worked for that character. Aside from the no regional exclusive thing, there really aren't any Japan-only characters who somehow managed to get big enough overseas to make sense as an addition.
Like, with SMT... it's either gonna be Nahobino, Demi-Fiend, a future protag, or
maybe Jack Frost (but probably not) if he would even count.
That's why I asked for clarification if by "retro character" they meant "NES D-lister". Because that's what all the characters the Smash community considers the "Retro" picks, are.
To be fair, we just go by Smash's rules. I'm sure people would love to update the parameters, include more characters.
In general, retro at this point is like... the sixth or seventh gen.
That makes it funnier that in the "Everyone is Here!" trailer, they didn't show him till after the trailer ended.
Every time I watch that trailer I forget Yoshi and Luigi haven't been shown until the last second. I just assume they were part of it, lol. I mean it's Yoshi and Luigi - even if the game shipped without them, I still would believe they were in there somewhere. Hiding behind 20 Cruel Smash KOs or something.
Ice Climbers, G&W, ROB, Pit(at the time of his addition), and Duck Hunt.
All these characters fit as "retro" by the Smash standard (I don't
think Mr. G&W showed up in any of the pre-Melee G&W Gallery games for GB, but I'm not 100% - I never played those games), but tbf, G&W, ROB and DH got in as the surprise picks like PP, which isn't necessarily a retro spot. But I guess notable but unorthodox retro characters are well-suited for it.
I find it pretty interesting that Rythm heaven was seen as important enough to have a character in development for Smash. Sure we never got the Chorus kids but the fact that they were gonna be in is interesting to me.
Tbf Rhythm Heaven was successful with enough titles for Smash, it's just the lack of an obvious/feasible character that kept it out of discussion. Once we had the one we'd presumably get, it's not like it didn't make sense. Though you'd never be able to tell that Smash cared about that series from how they've otherwise treated it. Can't even get an AT.
Now things are a little more difficult considering it's not really active anymore. And the fact that whatever kept Chorus Men out... has endured.
But I'd love to see a Rhythm Heaven character, I always like getting more Nintendo IP. Though maybe not as they were intended, if what actually prevented their inclusion was if whatever mechanic they undoubtably had didn't come together in an enjoyable way. Which is one of the theories.
Castlevania as a franchise was leaked for Smash, we didnt know which of the protagonists was getting in, though logically it would have been Simon.
From the audio leak we didn't, but Simon had already been leaked by Vergeben, who at that point was quite reliable.
I assume any franchise that started as Japan only but got worldwide releases later would have a character picked for Smash who's game you can play in English instead of a Japan only character.
I think the two possible exceptions to this (neither of whom would happen in the current state) would be Saki (who has VC... but... eh) and Ray MK. Having said that, I do think Isa and later Ray MK models would be alts. This is purely theoretical ofc, since... well it's S&P and Custom Robo. :/