You can't you need to keep on fighting people on Club Penguin then when you get to black belt fight Sensai and if you win you get a suit, if you're a member you can turn invisible, oh and there's a secret room you can go in with black belt. Hope I helped :)
its impossable to
No
Nope. Sorry, but you can't be a ninja unless you're a black belt and you've beaten the Sensei.
Obvious, you can't. you need a black belt or higher (Fire Card Jitsu) to defeat the sensei.
You keep playing Card Jitsu in the Dojo. When you get to black belt, challenge the Sensei. If you win, he will make you become a ninja and you will get a ninja hideout!
all you do is keep going to the sensi and remember to keep playing
if you wont to beat sensi on club penguin you have to have a black belt.if you are a black belt then you have to play with sensi.i know its very hard but if you keep playing and playing the sensi gets confused and starts to lose.there is an another way which is by buying a code.if you have a code you can win sensi very easily but it even ok without a code just keep playign with sensi and you shall win!!!goodm luck!
No.
Become a black belt
You need to keep playing Card-Jitsu until you earn up to the black belt. Then, challenge the Sensei and if you beat him, he will make you ninja.
It is a black suit with a black mask and a black belt.
get a black belt then battle the sensei