Headcanons of Smash Bros

Iggy Koopa ate more food, so he can get more vitamins so he can “fight properly” and that's why he is not skinny.
 
mega man refuses to believe that he's nothing more than a machine

captain falcon rocks out to this sentiment
 
Ice Climbers left Smash Bros. because they were being paid half the normal salary, seeing as they were technically one fighter.

Rather than try and get them back, they hired Duck Hunt. They give all the money to the hunter, and just pay the dog and duck in food.
 
Ice Climbers weren't in Smash Bros. because since all fighters are trophies and since those amiibos resemble trophies, it's not unreasonable to assume amiibos are trophies, so therefore, the Ice Climbers got scalped during amiibo production, so all fighters are clueless on where the Ice Climbers went.

Or, global warming dislocated the Ice Climbers' (they live in not-so-Infinite Glacier) so all this time in Super Smash Bros. 4, they're searching for a new home and have no time to fight.
 
fox is the prince of the mushroom kingdom per request

all those team matches

also brawl tea cup scene
 
stupid headcanons i have:
male robin and lucina are a couple, female robin is lucina's mother, chrom is chrom
ness and villager are friends but lucas is still his best friend
wario is an unlockable character because they didn't pay him enough to show up on time
pictochat 2 is a reskinned swapnote stage
 
Mario and Ness are extremely distant cousins, so that's why they share some animations with each other, especially in the earlier games.
 
Snake isn't in Smash 4 because he died by now. And we know that he actually does age, as opposed to all characters in smash who either fall under nintendo logic, are robots, pac man or sonic.