Players assume the role of a monster hunter as they capture, train and breed a powerful army from more than 200 classic Dragon Quest creatures in order to become the world's greatest monster trainer. Joker is a breakout title that combines the depth of a classic Dragon Quest RPG with the addictiveness of a monster catching adventure.

"Welcome to Green Bays, a cluster of mysterious islands that sparkle like jewels in the shimmering ocean! But travelers beware! The islands are not as peaceful as they seem, for they teem with a multitude of monsters both great and small. Green Bays is also home to the famous monster scout challenge. This renowned contest, held once every few years, determines who will be crowned the world's greatest scout. It is time for you to begin your quest to become the greatest monster scout in Green Bays and in history!"