Rarity in NKTCG

In the Nintenkingdom Trading Card Game, a card's rarity is, like other TCGs, how rare it is; it is also a general sign of how powerful a card is. A card's rarity is displayed in the form of coins in a card's upper-left corner. Sometimes when a duel is proclaimed, cards of a certain rarity or higher may be disallowed for the duel.

Different Levels of Rarity

 * Common - These cards have a single coin icon. These cards are plentiful and pop up more than any other cards.
 * Uncommon - These cards have two coins as an icon. These cards are not as easily obtained as Common, but still fairly available.
 * Rare - These cards have three coins as an icon. These are very hard to find and often powerful cards.
 * Limited Rare - These cards have a single red coin as an icon. These are even rarer than Rare and indicate the most powerful characters and concepts. Most character cards in the NintenKingdom series are Limited Rares.
 * Upgrade - These cards have blue coins as icons. They require an additional card or more in order for them to be used in a duel. They are split into four sub-categories:
 * 1) Common - One blue coin.
 * 2) Uncommon - Two blue coins.
 * 3) Rare - Three blue coins.
 * 4) Limited Rare - Rainbow coin.
 * Promo - These cards have a single gray coin as an icon. These are even harder to find than Rare and Limited Rare cards, and must often be received by special means.
 * NK64 - These cards have a single green coin with the NintenKingdom symbol as an icon. These cards are usually associated with NintenKingdom itself.
 * Unusable - These cards have a star icon. These cards are promotional cards that cannot be used in a game, sorta like Yu-Gi-Oh's Egyptian God Cards.