Did you not read the last sentence?
edit: Also, when those characters have multiple important roles of which both Toad and BJ do then they do equal importance. Toad has been playable 4 times I believe and Bowser Junior has been a final boss once in his own personal 3D game, a co-final boss at least twice, and several regular boss roles.
BJ has had one important role - Sunshine. It is the only game that acknowledges him as an actual character. In the Galaxy games, he was a random mini-boss with no real importance to the story (his robots could have been unmanned robots and it would not have made any difference). Bowser never even interacts with him either. Never speaks to him, speaks of him, or even does anything with him. They randomly share a few frames near the end, but that's it, and they still don't even interact. In the NSMB games, he's literally just the eight Koopaling. He has never been a final boss in any game. He was integrated into the final boss fight of NSMBU, but he's essentially a stepping stone for you to be able to attack Bowser.
Toad is not a character. Toads are a race. There was an unnamed Toad who starred in Wario's Woods, and you could play as him in Super Mario Bros 2 USA. However, in Super Mario Bros 2 USA, he was just a stand in for a character from the original Doki Doki Panic game, since he had a similar design to that character, and the original game was Arabian themed, as is Toad, so he fit the world of that game, since they couldn't re-tool it to be the Mushroom Kingdom.
Then you can play as Toads in a few multiplayer platformers, but it's still a nameless one in each case.
And then we have the Captain Toad game coming out.
In reality, the only game I count here is the Captain Toad game, since Captain Toad is a specific character, with an actually defined personality. But he debuted in Galaxy, and certainly isn't the first thing people would think of to represent Galaxy (
I'm foreshadowing, you see), and his new game has only been announced. The fact Toads are playable in the main series platformers is just laziness on Nintendo's part, and the one in 3D World is literally only there so they could say "aaaaaay it's like Super Mario Bros 2 in the US". I honestly don't think anyone would have cared if Toad wasn't in the game, and the fourth player was just Rosalina, who was in the game anyway.
Waluigi doesn't actually have a very strong fanbase, and with good reason - he only ever existed so Wario could have a partner in Mario Tennis. Hardly any effort has been made to make him more distinct from Wario.
Going into more opinion based territory, while it would be cool for Paper Mario to get a rep, I don't want it to be Paper Mario (besides, it would be entirely possible to make him an alternate costume for Mario). He is literally the exact same person as Mario, drawn in a different art style because why not. There are far more interesting choices within the Paper Mario franchise, it's full of really quirky characters - specifically the villains. And we do need more villains in Smash.
Rosalina, on the other hand, had a major role in the Galaxy series, had a defined purpose and personality within the Mario universe at large, had a fleshed out backstory, had a playable role in 3D World, and has proven to be one of the most popular Mario characters (play MK8 online - and no, it isn't her stats, Waluigi has identical stats to her, and Donkey Kong and Roy Koopa have minuscule stat differences to her). Plus, she's basically god in the Mario universe, so moveset potential is infinite. and even without all of that, people think of her when they think of Galaxy, and Nintendo want to strongly represent Galaxy since it got no representation in Brawl.
And yes, story importance is a relevant point. Otherwise, we would have Magnus as the new KI rep - a character who you could play as, but had little story relevance. But instead, we got Palutena, who you never play as in the KI games, but she's very important to the story. Plus, a character that's got a story behind them or is involved in some grand story in a significant way, is always going to be more memorable than one you play as with no real reason behind it(e.g. Toad).
How much more do I have to back it up than say 'They're like Ice Climbers because they play like Ice Climbers.'. And they do. I pointed out what makes them different from the Ice Climbers (which is fairly little), but fundamentally, they're still Ice Climbers.
And you say I'M the one ignoring the reality of the situation so things sound prettier to ME?
Man, I have finally run into the most ironic statement I will have ever heard on the internet to date. I can finally pack it up and move on. I feel like a ghost that's finally been allowed entrance into heaven. It's all over, I can stop suffering.
All kidding aside, man, like I said, I'm not trying to devalue the character. My argument is sound because at the end of the day, Rosalina is a simpler character than people are giving her credit for. All I did merely was point out that her level of complexity isn't even that of the Ice Climber's. My not wanting her to be in is, like everyone else's in this topic, purely personal opinion.
I just have a problem with people saying 'GOSH ROSALINA'S THE MOST AMAZING CHARACTER EVER THE MOST UNIQUE AND SHE TOTALLY DESERVED TO BE IN BECAUSE SHE'S THE GALAXY PRINCESS' when she's Space Peach: Ice Climbers Model. Of course that first part is, again, personal opinion, but let's just agree with one another that Rosalina is the Ice Climbers for people who don't want to learn how to desynch Nana and call it a day.
EDIT: Just for a little further proof that you're absolutely insane, a brief conversation with a friend on Steam who's not a rabid Smash fan. Names have been changed to protect the innocent:
11:56 AM - Magi: So, how familiar are you with Smash Brothers, and, particularly, how familiar are you with the new one coming up?
11:57 AM - Dax: Decently, why?
11:57 AM - Magi: You know about the Ice Climbers?
11:57 AM - Magi: And you know how Rosalina is a thing?
11:57 AM - Magi: In the new game?
11:58 AM - Dax: I already planned for the worst.
11:57 AM - Magi: Heh.
11:58 AM - Dax: No Falcon, no G&W, no Ice Climbers
11:58 AM - Magi: When you look at Rosalina, do you not see the Ice Climbers? I mean, not aesthetically..
11:58 AM - Magi: But functionally.
11:58 AM - Dax: I do. Considering Luma can come back even if you KO it.
11:58 AM - Magi: Thank you.
11:59 AM - Dax: And they attack in tandem.
There you have it, folks.
>say they aren't trying to de-value the character
>goes on to say the following in the same post:
I just have a problem with people saying 'GOSH ROSALINA'S THE MOST AMAZING CHARACTER EVER THE MOST UNIQUE AND SHE TOTALLY DESERVED TO BE IN BECAUSE SHE'S THE GALAXY PRINCESS' when she's Space Peach: Ice Climbers Model.
That's really all I need to leave you with.
And talking to a guy on Steam who hasn't really looked into the game a whole lot, who agrees with you, does not prove your point in the slightest. Ever heard of the saying "never judge a book by it's cover"?
Also:
11:58 AM - Dax: I do. Considering Luma can come back even if you KO it.
Ice Climbers don't do this, the secondary one only respawns after the main one is KO''d.
And:
11:59 AM - Dax: And they attack in tandem.
tan·dem(t
n
d
m)
n.
1. A two-wheeled carriage drawn by horses harnessed one before the other.
2. A team of carriage horses harnessed in single file.
3. A tandem bicycle.
4. An arrangement of two or more persons or objects placed one behind the other: driving horses in tandem.
The first three definitions are irrelevant to this topic, but the 4th one is only relevant to Ice Climbers. Rosalina & Luma CAN do it, but it's not their focus. And even then, they work in an asynchronous manner, since they perform different attacks.