Master the arts of parkour, karate and gymnastics
of course they can! in club penguin if you earn all belts and defeat sensei a ninja you can become and basically girls can become ninjas in real life if desired
Ninjutsu
Umm... I guess you can't become a REAL ninja even is your username has the word ninja in it. You can pretend to be a ninja if you wear a ninja costume. My username is prinsess5742, I log in pink cow and I'm a premium member. Also you have to be a premium if you want the ninja costume.
it's a costume he is not the real hokage!
when you see naruto in real life
You can become a ninja by going to Lakeshore and Ty will teach you to become a ninja.
fell of a building
you should become a fire ninja
You can teleport like a Ninja, as well as dress like a ninja (Using boolprop testingcheatsenabled true and pressing Shift and N in Create-A-Sim), but you can't -become- a ninja. You can't be paid to be a ninja, and you can't kill people like a ninja.
In real life-no.
Once you become a ninja you get a ninja mask and gain entrance to the ninja hideout. Once you are at the ninja hideout you can buy ninja clothing and furniture, train to become a fire ninja or a water ninja. Or just play other ninjas in regular card-jitsu.
No you can not become a vampire. They are not real and only exist in books and movies. They are not in real life.