This tells me you have not only not paid attention to what Sakurai was actually saying, but you ignored what I just pointed out
as well.
Sakurai
DID NOT SAY that Ridley's wings were reason for exclusion. He said that part of what would need to be done to make Ridley work as a fighter would be that wings would have to be scaled down.
Also, it
does not matter if his wings are tiny in the 2D games (and even then, they're only tiny for spriting purposes; if you look at what Ridley is SUPPOSED to look like in the official artwork for Super Metroid and Zero Mission, you'll see his wings are not meant to be pathetically small like in-game), this is Other M Ridley. Other M Ridley has a
very large wingspan.
And I will say this
again: "All of the characters in Smash are made as close to the source material as possible in how they appear. Ridley is no exception here. While aesthetic alterations may be made (or some not-so aesthetic like Wolf's claws or Zamus' Jet Boots), none of the characters have had to have aspects drastically reduced or
taken away solely to work as a balanced fighter like what would be required for Ridley."
THAT is the context of the "accurate portrayal" statement. Ridley teaming up with the players (which was a clear attempt to make up for the fact players couldn't actually control him that was poorly executed)
does not fall in context of the statement. And really, it's no bloody different than having Ghirahim willingly help out Link or Zelda when summoned by them or Andross willingly help out whoever summoned him, even if it's Fox or Falco.
As for those characters you listed....
Kirby characters:
-Sakurai's own creations. He has more free reign to change aspects about them than any other character.
-Kirby and Dedede have a particular limit on being able to fly as long as they
can hold their breath.
-Limitations on jumps are specifically nixed for playable characters in the Kirby series for the younger players, which negates the above limitation (though Kirby 64 features said limitation for Kirby).
-Meta Knight is the only one without a reasonable set limitation, however considering he's chivalrous, it can be handwaved that he limits how much he can fly
himself to fight fair.
Dark Pit:
-CANNOT FLY ANYMORE!!! By the end of Uprising, Dark Pit lost his ability to fly when Pandora left Dark Pit's body. He has to rely on Palutena or Viridi to grant him Power of Flight like Pit does.
Bowser Jr.:
-The Clown Cars used by Jr. and the Koopalings are mass-produced models (with Jr.'s being more personalized due to getting special treatment) that trade flight capability for increased weapon function.
Charizard:
-Despite having wings, it is rarely portrayed fighting while casually flying around outside of the anime.
And something to note about Charizard and Meta Knight is that they
had the ability to glide through the air in Smash initially (so did Pit, strangely enough). Gliding was then removed from the series for reasons unknown, thought it may have been because of bs like
this:
In comparison, Ridley has been portrayed in Smash previously as
never touching the ground except to leap from it or slam into it. Hell, Ridley even flies completely out of bounds and attacks from the background, something that would KO a player attempting to do so without outside assistance (Final Smash, Dragoon, etc.).
That is what it means for Ridley to be able to fly around freely.
To go from
that to having no flight at all with no reasonable excuse would understandably be a big change.
Which, if the
only one, would be no issue. But it isn't the only one, now is it?