The Ninja Hideout calls out to you. Its time you answer it.
Card-Jitsu starts as simple as possessing the belts:
Ultimately, you will need to get the black belt in order to face Sensei and move on. Without the black belt, you will never beat Sensei.
Tips: * Get friends to play with you and help you win.
* Sensei uses strong cards: pick the highest card you have.
* Sensei will get weaker each time you battle him. Sure, you may lose the first couple of times, but eventually, he will go down.
* Confuse him; he's just another penguin.
Methods for beating Sensei: Card-Jitsu
1) Water, water, fire
2) Fire, water, water
3) Snow, water, water
4) Fire, fire, water
5) Snow, snow, water
~As told by Lux1200
Guaranteed to help! I used the first method. ;)
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How to Become a Fire Ninja
You are a ninja. Congratulations. But don't you want to be just one step higher?
Go to the Fire Dojo. Click on the little stone door on the left side of the stairs in the Ninja Hideout. A hut like portal should appear. Be sure to purchase your amulet before you begin! ^^
Talk to Sensei...
Here is where your ninja skills kick in. The game is pretty simple. In fact, you should probably get used to the layout in less than a few minutes. You may play against a maximum of three other opponents. I suggest you play the "Earn your Fire Suit" to gain points instead of versing your friends on the mats, which really don't count. :/
Keep playing!

Methods:
- If Snow is an option and you have a Snow Card higher then 7 select it
- Try and pick a regular Card-Jitsu match and pick a 10+ Fire (if you have one), a 6+ Water and a low or high Snow Card
- He usually picks low Snow Cards and high Fire Cards


How to Become a Water Ninja
This Section is UNDER CONSTRUCTION!!!!!!!!!
P.S. Eventually, your amulet would look like this:
Fun Fact! :D