Lunar Knights Unlockables II (DS)

The burning sun transitions into ominous moon in Lunar Knights, as players take on the role of the solar powered Aaron and his lunar-enhanced counterpart Lucian as they lead an uprising against their vampire oppressors. Fueled by their powerful Casket Armor, the vampires have used the twisted powers of the undead to enslave the human race and disrupt the world's environment. 

Implementing an original climate mechanics, the gameplay in Lunar Knights cycles between day and night and generates real-time weather that affects all aspects of the game. Aaron and Lucian are more effective in combat when the sun and moon are at their peak, encouraging players to play as both characters and explore their unique solar and lunar abilities. Weather effects such as rain, wind and  
humidity impact the appearance and strength level of certain enemies while providing valuable clues on how to solve the many puzzles in the game. 

In their quest to defeat the vampires, Aaron and Lucian will be accompanied by a group of Terrennials, creatures imbued by the elements with special powers and abilities. The Terrennials will instill their specific element to Aaron and Lucian's physical attacks and can also unleash special Burst Attacks. Utilizing the unique functionality of the Nintendo DS hardware, players can input a variety of Burst Attacks using the touch screen and microphone that correspond to each elemental onslaught.

UNLOCKABLES

Sound Data

Have the Game Boy Advance game Boktai: The Sun is in Your Hand! in the cartridge slot to get the "Sound Data (Boktai)" available for purchase at Bulldog's shop in the Acuna Guild for 3000 Soll. 

Have the Game Boy Advance game Boktai 2: Solar Boy Django in the cartridge slot to get the "Sound Data (Boktai 2/Zoktai)" available for purchase at Bulldog's shop in the Acuna Guild for 3000 Soll. 

Have the Game Boy Advance game Shin Bokura no Taiyou: Gyakushuu no Sabata in the cartridge slot to get the "Sound Data (Shinbok)" available for purchase at Bulldog's shop in the Acuna Guild for 3000 Soll. 

Boss Rush mode

Successfully complete the game, then start a new game with your cleared game file. Enter Sheridan's Mansion to access Boss Rush mode. 

Hard mode

Successfully complete the game.

Here's a video of this game: