GameShark 2.2 (top), Pro 3.0 (left), and Pro 3.3's added SharkLink port (right)

A GameShark is a device used to hack the coding of many games, including games in the Legend of Zelda series, enabling the ability to cheat. It is used to create cheat codes such as infinite health and infinite Magic. Although the Gameshark is meant to help players, it is also responsible for crashing many Zelda games. It is currently owned by Mad Catz, a company that produces game-related products.

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