Card Jitsu Belts

Belts are clothing items you get as you progress to the ninja status. There are 9 different belts to collect. When a penguin gets a black belt, they may play Card-Jitsu with Sensei. Should they win, they become a Ninja.
 * White- Talk to Sensei and click "Challenge Mode" And beat 5 penguins. Continue winning in this mode to get more belts.
 * Yellow
 * Orange
 * Green
 * Blue
 * Red
 * Purple
 * Brown
 * Black

Trivia

 * There was a glitch where all the belts inyour inventory (except the white one) were gone. You coud still keep the rank in Card-Jitsu though.