Fire Ninja

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.

As a Fire Ninja, you can light up the fire tile in the Ninja Hideout

All the moderators and famous penguins (eg. Rockhopper) are ninjas and fire ninjas.

Fire Ninjas can do special actions when wearing the full costume.

It is possible to just verse Sensei once and become a Fire Ninja.

These are the item codes: Fiery Helmet (ID: 1086), Lava Mask (ID: 2013), Amulet (ID: 3032), Magma Coat (ID: 4120), Flame Sandals (ID: 6025).

If you try to unlock these items you can get banned.