Oh my friend many ways one way is you half to be friends with me and all the sense's the other way is wait years for it to come out if you wont to get to the shadow dojo now be friends with me...
There is also a water dojo now. Other dojos may have not come out yet, or are just not to Club Penguin's satisfaction.
On the game there is something called hacking go on it and enter the cheats
you need to put a starfish on his podium