I have a few problems with this, firstly Wikipedia isn’t exactly the most trustworthy of sites, secondly this is assuming 0 people bought the Xbox Arcade version and 0 people bought Rare Replay which are simply not true. But hey let’s assume that only the N64 version was ever released for the continuity of this post. Add that with the fact that the N64 sold around 34 million and the PlayStation sold around 100 million and it’s easy to see, if the numbers are correct, why Croc sold as much as Banjo. A LOT of people who owned a 64 owned Banjo AND Banjo Tooie because what the poster seemed to ignore was that Banjo-Tooie was 4 spaces down with 3 million units as well.
For context of attachment rates is that Banjo and Tooie has about an 8.5% attachment rate while croc has about a… 0.8% attachment rate, and that’s being generous. You know what game does have a comparable PlayStation attachment rate to Banjo though? Final Fantasy VII
It’s pretty disingenuous to just wave off everything everyone from a specific era loves to “oh it’s the just popular because of influencers” collectathon games didn’t become a genre because of youtubers, indie games following the formula of Banjo like Hat in Time and Yooka-Laylee didn’t happen because of Youtubers. This is just people not understanding the difference between influence and sales.
Edit: beyond all this you brought up Bloodstained and yeah, most new games released now will have a better chance of outpacing their predecessor. The market now is simply a lot larger and when a game comes to multiple systems alongside it then it’s already better off.
Not to mention, it uses only sales as a metric while failing to take target audience into account. Banjo-Kazooie is still among the top 20 best selling games on the N64 - people often forget how poor the third party support was compared to the PS1. No, really, search how many licensed PS1 games there are compared to the N64. Meanwhile, Croc is closer to the top 40 on the PS1 - and that's from a Wikipedia chart.
Also according to sales data, BK is only outshined in its genre by... SM64 and DK64. Two pre-established francises. Meanwhile, Croc is behind... all three Crash games, all three Spyro games, the first Rayman and...
Oddworld. All of them new series at the time. Even without going into specifics about gameplay, quality and legacy, it's easy to see why BK impacted people more than Croc did.
Using sales as the only metric is a rather poor way to do it, because then we'd say goodbye to 90% of the roster - including some 3rd parties, even. By that logic, we should have Resident Evil and Monster Hunter in Smash replacing Mega Man and Street Fighter, because if those series sold more, surely they have a better legacy, right?
This isn't some "Nintendo influencers are controlling history" thing, it's simply people talking about games thay like and the fact that many of these games, like Castlevania and BK, also have a decent amount of history and legacy to support them.
As for how that applies to Smash... well, it's Nintendo fans talking about games they played on their Nintendo systems that they think would be cool on a Nintendo crossover game. Seriously, if you expected anything different, I'd argue that's on you.