Trade & Battle: Card Hero (トレード&バトル カードヒーロー, Toreedo & Batoru Kaado Hiiroo) is a card battle role-playing game developed by Nintendo R&D1 and Intelligent Systems and published by Nintendo for the Game Boy Color. It was released in Japan on February 21, 2000.

The main objective of the Card Hero series is to defeat the opponent's Master card. To do so, players hold Stones that are used to play cards and four Monster card slots (two in the front row and two in the back). The player attacks the opponent's Master to drain the opponent's HP to 0 and win the game. However, the Master has a shield of 2HP, which is usually the maximum strength of most Monster cards' attacks. Therefore, the player can only damage the opponent if the strength of an attack is 3 or higher, and the damage would then be reduced by 2.

Despite the fact that most Monsters are unable to damage the Master initially, there are several ways to increase its strength so that it can. One way is to have the Monster card not move for one turn. On the next turn, it will become charged. This causes the strength of the Monster's charge attack to increase by 1. The player also can use items on the Monster, such as Power-up. The preferred way to strengthen a Monster is by increasing its level, which can be done by defeating another Monster.

There are three different rule sets in this game: Junior, Senior, and Pro, which affect the number of cards in the player's deck and the master cards. The Junior game is very basic; players use decks of 20 cards (15 in the Game Boy Color game) and normal Masters with 5HP. The Senior game is basically the same, but with the addition of Magic Master cards. The Pro rule set uses 30 cards and Magic Masters with 10HP.