Go to the Ninja Hideout, click on the red tombstone which has a fire indication sign above it.
Go inside and talk to the Sensei, he should give you a starter deck. Card-Jitsu fire is all about the number of the card. When playing Card-Jitsu fire, select one of the center stones. It will give you a number of 1-6 which will then give you an option of which type of card you want to play.
- If you lands on water, ice, or fire then it will be a water, ice or fire battle. In this case, always choose the highest number of the card type chosen.
- If two penguins land on the same stone, or the stone has two Card-Jitsu cards on it, there will be a regular Card-Jitsu battle. In this case, choose whichever card you think will beat your opponent.
- If you lands on the spot with a water, ice, and fire on it then it will be your choice which card type will be played. In this case, choose the type which you have the highest number for.
The object of the game is to make your opponents run out of energy, which can be found on the left side of each penguin icon. You can gain energy by beating an opponent in a 1 vs. 1 Card-Jitsu battle. If you lose a battle, you will lose one energy.
Once you have received your fire ninja deck, you will be able to compete for your fire ninja outfit. To do this, click on the “Earn your Fire Suit” option.
On the left side of the Volcano, you will see a legend with all of the Fire Ninja clothing items.
Once you have unlocked all of the Fire Ninja items, you will be able to beat Sensei. It may take a couple of times to beat Sensei, but after you beat him you are considered a Fire Ninja.
Thanks to Club Penguin CP!