River King: Mystic Valley is a complete edition video game for the Nintendo DS platform, released in 2008 by Nintendo. This simulation, role-playing and action-adventure game is rated E for everyone and is part of the River King: Mystic Valley video game series.

This game comes with a manual and has been tested to ensure its functionality. As the player, you will embark on a journey to find the mystical fish, explore a vast open world, and encounter various challenges. Join the adventure and experience the thrill of fishing, crafting, and battling monsters in this immersive game.