Fire Ninja

Background
Fire Ninjas are now available and you can only gain the status of a fire ninja by defeating Sensei, and the more you progress through the game, the more fire items you get. Once you have all the items, you must face Sensei to get a fire gem for your amulet. Only then may you be known as a fire ninja. The items are the Lava Shoes, Magma Suit, Lava Mask and Fiery Helmet

Trivia

 * So far, not many penguins have became fire ninjas.