MapleStory DS

This single-player spinoff of MapleStory provides a story-based look at the
world of MapleStory. The player can choose one of four different classes; the
player starts the game with one of two unlocked, depending on a quiz they
start the game with, and can unlock the other three over the course of the
game. Like its MMORPG cousin, MapleStory DS is an action platform game with
RPG elements; each character starts with a basic attack, and can be customized
with extra spells that can be mapped onto the DS’s buttons.

While this game and MapleStory are separate, MapleStory DS does have
unlockable codes that let the player obtain items in the MMORPG.