Except that is literally the point... the most common excuse in the book.
It's the most common excuse because it's the actual reason, giving literally any other answer would be the excuse.
Sakurai could of added Little Mac or someone else. That doesn’t change the fact that there is nothing significant about the ice climbers and their not relevant. Not even the top 50 best selling NES games.
Well it is in the top 50 best selling NES games, and it sold 1.5 million copies, but I agree Sakurai could've added any number of other NES characters instead. Like I said, he tried to add (at least) three others before settling on ICs. But it just goes to show he was looking for representation of a time period instead of a specific character.
Since Kid Icarus got modernized, there are no plans for the future and it’s been technically almost 10 years since there’s no new game so the kid Icarus cast themselves are irrelevant. Geno can be a retro character. He’s from a beloved cult classic.
You do realize that the majority of the Kid Icarus characters were added right after Uprising, right? It's not like he added them in Ultimate. They weren't irrelevant then. Pit is a different story, the path Sakurai carves out for retros won't be of use for Geno. Yes Geno is a retro character by our standards, but by Sakurai's, the cutoff seems to be the 80s.
More importantly though, the "retro rep" doesn't even seem to be a thing anymore, and hasn't been for two, maybe even three games. So that door is closed anyway, even if Geno could fit through it. Using those characters as precedent is entirely flawed, because what lead to their inclusion is a huge exception to the standard process, especially for third-parties.
If I were using the “don’t belong in Smash” standpoint for example, just because you’re from the N.E.S era, doesn’t mean you automatically deserve to be in Smash.
I would agree with that, but clearly Sakurai doesn't. Or I would at least posit that "retro", at this point, is probably up to... even Gamecube days, so he could stand to widen the parameters. But what we think doesn't really matter, because we don't pick the characters.
These are fair points, but I didn't construct a complete list. There's one character who fits the venn diagram with Geno by those three common detractions: Duck Hunt.
[ X ] 20 Years old by the time of his inclusion
[ X ] Appeared in exactly one game
[ X ] not even the main character (that would be you, guy with the gun)
Your list still isn't complete, because while you only listed three hindrances, there is the additional one I mentioned: being third-party. Were Geno first-party, he probably would've been included back in Brawl. In that diagram, and not a partial one, none of the current cast share the centre.
If we want to talk about cumulative hindrances, I could add onto all of the things that potentially stopped Duck Hunt from getting into the game by common arguments against other characters. He doesn't have a canon name, he has no personality, he's literally an animal, he has no moveset... I'm sure if I really thought about it, I could come up with others.
Those aren't real hindrances, pitch 'em. Those examples are like saying Geno can't get in because his real name is unpronounceable.
I'm sure there are people who would try to say the big scary "third party" is a bigger hindrance than all of those, but Banjo is in this game.
You've again gone back to evaluating things based on a single hindrance I see. Banjo
also was greatly hindered by being third-party, were he not he would've been included long ago as well, but between Banjo and Geno, one actually has successful eponymous series they lead; it's a whole different level in terms of recognition. In fact, none of the three aforementioned impediments are applicable to Banjo.