Your headcanons

[J-Yoshi64]

Bowser only gives you free coins in Mario Party with the intent to steal them or a star later.

I'm pretty sure he speaks this intention at least once.

 

[QuilavaRDSP]

Mario and Bowser are only enemies because of their rivalry over Princess Peach.

 

[Magikrazy]

Headcanon full names ahoy!

Mario Jumpman Video
Luigi Mario Video
HRH Princess Peach of Toadstool
Captain Toad
HM The King Koopa (Bowser I)
HRH Bowser II, Prince Koopa
Wario D. Wiener (he had his name changed to this, D doesn't stand for anything)
Waluigi The Idiotic Man-Elf(his parents didn't like him that much)
Rosalina, Goddess of the Galaxies (self-proclaimed; can't remember real last name)
HRH Princess Daisy of Sarasaland
Shelly (Birdo's given name)

The others all use their full names and/or don't have or need additional ones. These aren't perfect but it's something I thought I'd do for fun.

 

[freakworld]

Wario D. Wiener (he had his name changed to this, D doesn't stand for anything)
Waluigi The Idiotic Man-Elf(his parents didn't like him that much)

 

[Polymorph]

Mario's favorite song is Stayin' Alive.

 

[Xiahou Dun]

Coincidentally, we actually put that as the overworld theme in New Super Mario Bros. Wii.

 

[Polymorph]

Nice, I guess we both have a similar headcanon when it comes to that.

 

[Fawfulthegreat64]

Dimentio went insane because his family was killed when Count Bleck wiped out his world. One of his goals is to bring them back from the dead when he remakes the universe.

There's probably details that make this impossible but whatever.

 

[Mcmadness]

My headcanon. That game and everything in it was a bad fever dream.

 

[Mister Wu]

My headcanon. That game and everything in it was a bad fever dream.

There was no Wart, though.

 

[Mcmadness]

I said a BAD fever dream.