Tusk

Tusk is a walrus and the lead antagonist at the Card-Jitsu Party 2013. He is the one who sent Scrap, Sly, and Tank out to defeat Sensei and destroy the Dojo. Tusk seems to have hatred for Sensei and his Ninjas, and is from Sensei's childhood, being Sensei's best friend, but turning on him out of jealousy. You can battle him after receiving the Snow Gem.

Early Life
When Sensei was a young boy who had not yet learned Card-Jitsu, he used to play with Tusk. They swang and had snow ball fights and seemed to be good friends. One day, when Tusk made some snowballs, Sensei made a snow statue of the future dojo. Tusk seemed bitter at this, sensing Sensei would later become more involved in it.

Revenge on Sensei
Tusk sent the 3 Snowmen, Tank, Scrap and Sly to attack and take revenge on Sensei, but Sensei and the Ninjas withstood the attack.

Trivia

 * He is the second villain and character in Club Penguin to have legs, the first being Herbert.
 * In the 1st scene in Card-Jitsu Snow, he was Sensei's friend long ago, but the friendship crashed, because of jealousy.