Mega Man Battle Network 4 - Blue Moon

Mega Man Battle Network 4 is a video game developed by Capcom for the Game Boy Advance. It is the fourth game in the Mega Man Battle Network series and has two different versions: Red Sun and Blue Moon, which differ in story and gameplay details. The game features the protagonist Lan Hikari and his NetNavi, MegaMan.EXE, as they uncover a conspiracy involving the DarkChip Syndicate Nebula and prevent an asteroid from colliding with Earth. The game introduces the concept of DoubleSoul, which allows MegaMan.EXE to use the powers of other NetNavis temporarily during battles. The game can be linked up with other games like Rockman EXE 4.5 Real Operation, the Battle Chip Gate, and Mega Man Zero 3 and contains references to Konami's Boktai series.