Blue Dragon - Ikai no Kyojuu (ブルードラゴン異界の巨獣) is a role-playing game developed and published by Mistwalker and Artoon for the Nintendo DS platform. The game is set in a fantasy world where the player must battle various monsters and bosses. The main characters are Shu and Jiro, two children who have been chosen by the Blue Dragon to fight against the evil forces of Nene. The player must use various strategies to defeat the enemies and progress through the storyline. The game features a turn-based battle system where the player can choose from a variety of attacks and abilities. The player can also switch between the two protagonists at any time during the battle. In addition, the game features a unique summoning system where the player can summon powerful allies to aid them in battle. The game also features an extensive character customization system where the player can customize the appearance and stats of their characters. The game also features a variety of minigames, such as fishing and alchemy, which can be used to improve the stats of the characters or to obtain new items. Blue Dragon - Ikai no Kyojuu also features a variety of side-quests which can be completed to obtain rewards. The game also features a special dungeon which can be accessed after the player has defeated the final boss. Overall, Blue Dragon - Ikai no Kyojuu is an enjoyable role-playing game for the Nintendo DS. The game offers an engaging story, a variety of minigames, and an extensive character customization system. The game is also filled with a variety of monsters and bosses, making it an enjoyable experience for both experienced and new players.