To say Mario is
always smiling and super happy fun time is exaggeration.
There are plenty of times Mario is serious, especially in the RPGs.
And then there's the Strikers games....
Much happy. So smile.
It
would make sense that Mario put on a more serious disposition for a fighter.
Chalk that up to how their official voices
were animalistic back in the 64 era before Bowser became Spike from Tom and Jerry and Donkey Kong became Scooby-Doo, as well as Brawl's more "gritty" environment.
The newer voices
would fit better in Smash 4, admittedly.
He wasn't exactly wearing weighted armor in WW, now was he?
Look closely in the concept art. See that mini sketch of Ridley flying after Samus? See how his beak opens like that?
Not that I'm saying it's justified, but it's not exactly
out of nowhere.
Actually, we don't know that for sure, because what concept art Other M Ridley needs first of all is a
model to judge by.
The glitches existing =/= they don't care.
Glitches are glitches.
They just happen. Especially when the case for
this one is due to a very specific event occurring; Ridley being knocked over at the very instance he first lands.
Or should Smash 4 itself just be considered a product the development team didn't care about because numerous glitches exist/existed?
As for the textures, yes they are rather bad when looked at close up, but at a distance they look fine.
In fact, they look like they were made to blend with the brighter colors of the cast.