You shouldn't let other people tell you which is better, that is your opinion. :)
It doesn't
Sonic can fight Kirby in Super Smash Bros Brawl.
Play as Kirby 20 times and you will get Green Greens [Kirby's stage].
Kirby starts as a playable character; you don't have to unlock him.
No Kirby super star ultra was made AFTER brawl
Battle 20 times with Kirby in brawl mode.
U have to complete classic mode with Kirby
Yes.
play as everyone and defaet kirby play as kirby to
You can't, Kirby can only jump 5 times in a row.
Play as Kirby 20 times and you get the Green Greens stage.
i believe 7