Not much, all that happens is that Mario wins and Kirby dies, which doesn't really matter anyways.
In SSBB (Super Smash Bros. Brawl) Kirby would be turned into a trophy
(asker): NOOOOOOOOOOOOOO
Mario wins, but if Bowser is 2% better, BOWSER WINS.
Mario always wins
It ultimately depends on personal preference and playstyle. Kirby is known for his versatility and ability to copy opponents' abilities, while Peach is known for her powerful aerial attacks and turnip projectiles. Both characters have their strengths and weaknesses, so it's best to experiment and see which one suits your playing style better.
Mario is a classic so its obviouse mario wins
My mom.
He is a tyrant from Kirby superstar! He seems cute at first when he asks Kirby to grant a wish on "Nova," a wish granting star! When Kirby was about to make his wish, Marx pushed Kirby out of the way, then he wished he controled popstar, the planet Marx lived on! Marx gets wings, and Kirby first had to deactivate "Nova" and then defeat marx... in the end Kirby wins(duh) and marx gets shot into "Nova" and the star exploded, Marx dies, and popstar is safe.... until Marx returns in Kirby Superstar Ultra.
Its so obvious! Mario will leave Sonic lying on the ground,groaning.(Mario wins).
the party wins the election
Here we gooo! (super mario 64) Oh yeah! Mario time! (new super mario bros wii u Wahoo! (various) Thank you so nice! (new super mario bros) Okeydokey! (I remember it from mario vs donkey kong, probably in others too though) I got it! (Leveling up on Mario & Luigi Bowsers Inside Story) Mario number one! Yeah, Mario wins! Wahoo! Oh yeah, I did it! etc (Mario Kart series)
no one wins
He wins
When Mario wins in Mario Kart 7, one of the things he says is, "Oh yeah! I did it!" When Mario loses, he tends to exclaim, "Mario loses, oh no!" Other Mario quotes include "It's okay; I'll get you next time" and "Mario Kart 7!"