you dont ty to beat sensei, he actually helps you, you have to challenge sensei's friend named Tusk.
u beat fire ninja first
it can come after a few weeks
you should become a fire ninja
You become a ninja and click on the gray stone in front of the ninja hideout.
You can enter the ninja hideout when you become a ninja on club penguin, and go to other element card jitsu games (member), like card jitsu fire and water.
you have to be a member on club penguin to be invisible you have to pay if you have to be a member?
You become a ninja.
You can't yet.
Go in the ninja hideout, and buy it from the ninja catalog.
you can't unless you get a membership card
Wait there might be in 2012 snow ninja
you cant become sensei but you can be a ninja
1
You can't yet.