How Did Tusk Get to Club Penguin

Tusk mysterious master of snow and  a walrus but how did he get to club penguin did he come here like Herbert the polar bear on a ice berg or did Sensei come from where tusk was from and both came together with new penguins its unknown but the question Tusk Friend Or Foe  the mammals on club penguin may all live there but are slowly showing themselves in the light for example puffles fluffy friends cuddly companions perfect pals but how did the islands best buds come here but thats not the point i will ask you why or how tusk got here