And I'm going to be the first to recognise that Toad's inclusion in 3D World was only as a throwback to SMB2 USA. It wasn't meant to seriously reflect his character, he's just a random player avatar. A Blue Toad and a Yellow Toad are always used as extra player characters because the model is there. Nintendo use Toad as playable out of pure laziness in these platformers, and knowing that, I can't view it as a serious representation. Especially keeping in mind that there is no singular Toad in the Mario games, they are a race.
There is no singular 
either, they are a race.
And this still ignores that Toad does nothing that Mario and the others don't already do.
does nothing that doesnt do.
3D World didn't have a story, as I already stated. It had a plot, not a story.
And Rosalina is still more important. In universe, she's god of the Mario verse. Toads wouldn't exist without her nurturing the cosmos and tending to the universe reboots. In real life, she was basically the main character of Super Mario Galaxy's story (most story sequences and plot exposition in the game revolve around her, making the "Mario saves Peach" plot an after thought by comparison), which just so happens to be one of the most critically acclaimed Nintendo games, and a lot of people specifically loved her in it. That alone warrants a Smash appearance, even if you ignore every other possible point that can be made in her favour.
It's not like toad was the protagonist of his own game or anything, oh wait.
Toad simply being in games as an extra in most cases is not important, especially since, again, it is not a singular character, it is a race.
And so is and technically all pokemon
Pit doesn't fly in Smash (his Up Special is the Power of Flight, which is a divine aid that let's him fly for five minutes. It can be powered by Palutena or Viridi).
And these things don't define the characters and are things that are often different depending on the game (Mario can take as many Blue Shells or Bob-Ombs to the face as he needs to in Mario Kart).
I'm not saying Smash has to adhere to every detail of canon, but the characters need to be represented as themselves in some way. Smash is allowed to bend the rules over things like size, but it can't just change a character's personality entirely, which would be necessary for Toad to fight in Smash. Because completely changing what makes that character who they are defeats the purpose of putting them in Smash.
Also, Captain Toad can't jump because his backpack is too heavy. If you take that away then it may as well not be Captain Toad.
Captain toad isn't known for not jumping, he's known for being adventure toad.
Define how those games are canon. Because the way I see it, you could take any of them out of the canon and no problems would occur, especially since they don't take place at any specified place on the timeline (yes, Mario has some degree of a timeline, albeit an incomplete one) in relation to other games.
Unless it's the cdi garbage, it's canon.
Also, as I said before, if he is not there when I play through the game and only shows up in one or two cutscenes, and the game doesn't explain this, I can come up with whatever justification I want, since none is given to me, which can include him not participating.
Aka fan theory. Are you gonna tell me that and aren't in kirby rtd now?
I want Wario to feel heavier and be taller than or at least as tall as Mario. It looked so weird in Brawl in my opinion. Especially considering how in Mario Party games he isn't that short.
