No, she's good; she's on Mario's side. Mario can only kill bad guys.
u gotta kill bowser 3 times
kill the boss
You have to have (or be in) mini Mario form and kill the boss in world 5.
What I did was be my normal self and kill the baddie 2 times and then turn into a small perosn on the last hit.
He is a large boulder dude that isn't difficult to kill at all. Pretty rad guy.
jump on it
(The hey is wrong with you?) No, you cannot kill Luigi in Super Mario galaxy. (He's too precious)
kill mario
Yes, but only with a star
You cannot really kill ghosts in Super Mario unless you have an invincibility star in use. However, you can stop them by looking at them, which makes them cover their faces.
get the right pattern of floors to defeat the boss kill baby bowser, jump behind bowser and dash to the switch then jump on it
you have to shrink yourself and where the guy throwing the boomerangs you kill him and you get on the little bridge and bounce from side to side.