Wikipedia

 

Lunar Knights revolves around two characters: Lucian and Aaron. Lucian (Sabata in Boktai DS) is a dungeon scroller, wielding various dark melee weapons. He is also imbued with the power of darkness, and can change into a vampire after he builds up a Trance (shortened to TRC in-game) meter by fusing with his Terrennial, Nero, which allows him to absorb life out of his foes, a mechanic that debuted in Boktai 2 as Black Django. Nero is based on the cat of the same name in Boktai 2, who was rescued by Sabata many times.

Aaron (Django in Boktai DS) is an apprentice sharpshooter, and uses a variety of Solar Guns to deal damage to his undead foes. Unlike Lucian, Aaron has light powers, and can temporarily become an avatar of the sun when needed by fusing with his Terrennial, Toasty (known as Otenko in Japan and the English versions of the original games), much like Sol Django in Boktai 3 (released only in Japan).

The player increases the two characters' levels by killing enemies, and their weapons may be upgraded with various parts, allowing more abilities to be used with that weapon.

The ultimate goal in Lunar Knights is to destroy a number of boss vampire enemies, in which the basic mission is to defeat each of them in their respective dungeons, either by exploiting their elemental weakness or using Trance to quickly lay waste. Once this is accomplished, the boss is launched into space using the Casket Rocket, Laplace; the player would then enter a mini-game consisting of 3 parts. The Casket Rocket is controlled from a third-person perpsective with the stylus. By moving the stylus, Laplace moves, and tapping the screen causes it to fire lasers. After these 3 segments have ended, there is a short video segment in which the defeated boss is purified with the intense solar radiation in the stratosphere, made possible by the Interstellar Satellite Sunflower.

As more bosses are defeated, the player is able to gain access to different elements through terrennials. There are 4 different terrennials available besides Nero (Dark) and Toasty (Sol): Ursula (Flame), Tove (Earth), Alexander (Cloud), and Ezra (Frost). With each acquired terrennial comes a different climate for the player to manipulate with. This can be done by going to Sheridan's Mansion and selecting 'Change Climate' to change the default weather. Certain parts of dungeons, which often hold new items and weapons, are inaccessible unless the player changes the weather. Special high-priced items are dropped by enemies or objects under certain climate conditions.