Your headcanons

[Qayin]

The Koopalings were introduced as Bowser's children back in SMB3. They got retconned into Bowser's minions once they were back in the series from NSBWii on since Miyamoto and Co. didn't dig the idea of Bowser having 8 distinct looking children instead of one.

 

[The Nate]

The reason why Peach sounded so different in Mario 64 is that she was trying to sound really, really, REALLY good for Mario.

 

[ThatGuy62]

My headcanon is of a stubbornness to refuse to accept Nintendo's revised backstory for the Mario brothers. To me, they'll always be those Brooklyn plumbers who got sucked through a magic drainpipe into the Mushroom kingdom.

I have similar feelings towards some of Nintendo's recent changes to the lore. (I.e: "The Koopalings aren't Bowser's biological offspring")

Note that Nintendo never said that at all. Miyamoto only said that in the current story the Koopalings aren't Bowser's children, the biological part was never stated nor even implied. In Japan, the Koopalings since Super Smash Bros. Brawl and New Super Mario Bros. Wii aren't adopted children at all, they don't have any family relatioship with Bowser that they call Master Bowser (KuppaSama) and they aren't even related with each other (they call the others Nakama, comrades).
I'm surprised how popular this misinterpretation became, I wonder where did that originate from.

I think that's moreso just people flatout ignoring the retcon or attempting to compromise.
The RPGs have left little ambiguity at this point (barring certain translations of Paper Jam).

The Koopalings were introduced as Bowser's children back in SMB3. They got retconned into Bowser's minions once they were back in the series from NSBWii on since Miyamoto and Co. didn't dig the idea of Bowser having 8 distinct looking children instead of one.

I have a crackpot theory that it's also due to their differing roles (world bosses vs secondary antagonist). Note that the Junior Clown Car (Introduced in NSMBW and having a clear connection to Bowser) has since replaced the Magic Paintbrush (which is reminiscent of the Koopalings' Magic Scepters which are their iconic weapons).

 

[Teedgee]

The reason why Peach sounded so different in Mario 64 is that she was trying to sound really, really, REALLY good for Mario.

She sounded older than modern Peach. So maybe Mario 64 is happening in the future!

 

[Qayin]

I have a crackpot theory that it's also due to their differing roles (world bosses vs secondary antagonist). Note that the Junior Clown Car (Introduced in NSMBW and having a clear connection to Bowser) has since replaced the Magic Paintbrush (which is reminiscent of the Koopalings' Magic Scepters which are their iconic weapons).

My crackpot theory theory is that Miyamoto and Co. noticed that the diverse looks of the Koopalings and Bowser kidnapping a beautiful princess had hints of adult situtations (I'm talking harems, concubines, *bleep* children) that weren't allowed. So the Koopalings were turned into Bowser's minions for the current era of Mario where Bowser being drawn to Peach as a lady and not just a tool for him to exploit is more obvious than ever.

She sounded older than modern Peach. So maybe Mario 64 is happening in the future!

That was just Peach's old personality before she got sillier/ditzier and Rosalina was a thing. Going from Mission to Rescue Princess Peach and Super Mario Adventure, Peach was more of a straight noble monarch/high queen figure (aka Rosalina).

 

[ThatGuy62]

Bowser kidnapping a beautiful princess had hints of adult situtations (I'm talking harems, concubines, *bleep* children) that weren't allowed.

Kinda odd considering Bowser's entire plan in Sunshine was basically telling Junior that Peach was his mom. Add in Peach's response and people seem to seriously consider the third scenario.

 

[Fawfulthegreat64]

This is more of an alternate interpretation in a desperate attempt to explain the vastly different depiction of everything after Super Paper Mario. But it is an interpretation I've had for a while but never bothered trying to expand on. Most of this is a product of my wandering mind listening to The Sound of Silence while drawing Paper Mario.

Paper Mario: Sticker Star and Color Splash take place after a split timeline in which the heroes fall to Dimentio in Super Paper Mario. He spares the lives of Mario, Peach and Bowser, wiping their memories and sending them to his rebuilt version of the Mushroom Kingdom, while still using Luigi as a vessel. He creates a new Luigi without a soul, the one that never speaks in Sticker Star and most of Color Splash. However in Color Splash, the real Luigi who had been subdued within his own mind by Dimentio is able to break free temporarily, but is still under enough control to not be allowed to say anything about the truth of what happened.

When Mario found the scraps of paper written by Goombella and Parakarry in Sticker Star, he briefly found the names familiar and started to recall his past, before something in his mind immediately forced him to forget who they were. It was the seed of the Floro Sprout that was secretly repressing the memories of everyone in the world who remained alive. I want to write a whole story about Mario, Peach and Bowser slowly realizing something is off and Luigi constantly switching between a souless zombie and his talkative normal self who seems to know things he can't say. And the eventual defiance of the control the sprouts have on them. But probably not because I can't write things like that over a period of time without losing interest :/

 

[ThatGuy62]

This is more of an alternate interpretation in a desperate attempt to explain the vastly different depiction of everything after Super Paper Mario. But it is an interpretation I've had for a while but never bothered trying to expand on. Most of this is a product of my wandering mind listening to The Sound of Silence while drawing Paper Mario.

Paper Mario: Sticker Star and Color Splash take place after a split timeline in which the heroes fall to Dimentio in Super Paper Mario. He spares the lives of Mario, Peach and Bowser, wiping their memories and sending them to his rebuilt version of the Mushroom Kingdom, while still using Luigi as a vessel. He creates a new Luigi without a soul, the one that never speaks in Sticker Star and most of Color Splash. However in Color Splash, the real Luigi who had been subdued within his own mind by Dimentio is able to break free temporarily, but is still under enough control to not be allowed to say anything about the truth of what happened.

When Mario found the scraps of paper written by Goombella and Parakarry in Sticker Star, he briefly found the names familiar and started to recall his past, before something in his mind immediately forced him to forget who they were. It was the seed of the Floro Sprout that was secretly repressing the memories of everyone in the world who remained alive. I want to write a whole story about Mario, Peach and Bowser slowly realizing something is off and Luigi constantly switching between a souless zombie and his talkative normal self who seems to know things he can't say. And the eventual defiance of the control the sprouts have on them. But probably not because I can't write things like that over a period of time without losing interest :/

See, I just sort of accept that Sticker Star, Paper Jam and Color Splash are a different continuity whereas the previous games happened in the usual universe (the fact that PM1 elements such as the Star Spirits have appeared in other games on occasion is fuels this interpretation further).
It just seems weird that people need to make extremely complicated explanations when "alternate universe" is not only simple, but allows people to completely ignore the series until it sorts itself out (and if it retains the reboot continuity, well, let's just cross that bridge when/if we get to it).
On a related note: Kammy isn't dead or anything, she just retired to the Mushroom World equivalent of Cancun or wherever. Every month she calls Bowser and talks his ears (?) off.

 

[Fawfulthegreat64]

Yeah it's fine to just think of them simply in a different continuity but it's fun to try and explain it anyway :P

I like that idea more than the idea that all Bowser's minions are there for life tbh.

 

[ThatGuy62]

Yeah it's fine to just think of them simply in a different continuity but it's fun to try and explain it anyway :P

I like that idea more than the idea that all Bowser's minions are there for life tbh.

Well, alright I guess. Still, it can kinda feel somewhat meanspirited how it's gone about (there's a fanfic on FFN called "Conformity" that tries to explain the generic Toads for example), but that's probably just me.

Bowser takes retirement plans very seriously.

Spoiler

Post-retirement plans, on the other hand...

 

[J-Yoshi64]

I've thought longer than anyone probably should about if Nintendo ever did got "retro Mario characters" like in Sonic Generations or whatever. Particularly the girls' looks and voices.

Retro Peach would have her Leslie Swan voice from Super Mario 64.

Retro Daisy would have her Jen Taylor voice from the earlier Mario Party installments.