That would assume that every gamer knows the full catalog of Nintendo characters, which is unwise to do. I also want Wonder Red and Mallo. Those would be considered obscure (but not retro) to a vast majority of gamers. Maybe not us here on this forum, but to people who buy and play smash bros games now and in the future.
That's kind of the issue here. Your definition doesn't fit a lot of people's, and some aren't necessarily obscure to others. You're using something that's too subjective for a simple description.
That's a case where one should just list who they want, as examples, and hopefully it'll help get what you overall mean better. Cause as of now, there's no good way to define what you want into a few simple wrods.
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That said, I do feel "everyone is here" is also a huge callback to Nintendo as well, as almost every character back is either 1st or "2nd" party to begin with. A ton of Nintendo characters returned, some either after missing a full game(I'm saying this as Smash 4 is one game total roster-wise) or 2. So while it's a callback to Smash's history, it's also a callback to Nintendo's history as well. Wolf, Ice Climbers, Young Link, Pichu, Ivysaur, Squirtle. Snake is the only returning 3rd party that was cut beforehand too. And this isn't counting how others luckily returned in Smash 4. Besides, most of the roster is still 1st party either way. So I don't know how it isn't legitimately celebrating Nintendo's history too. As well, there's a significant amount of Spirits more than Trophies at this point, so it also heavily acknowledges Nintendo's history. Smash never stopped celebrating Nintendo's history along with other 3rd party gaming history. It's just not always the "biggest" thing that brings players in like it used to be.
I don't disagree with having more cool Nintendo characters. Just in general, there's a ton who aren't there as is, like Mike Jones, whereas some are only kind of there like Porky(depending what the Absolute Safety Capsule was meant to be), and so on.