The "Battle Network Series" is a popular video game franchise developed by Capcom, set in a futuristic world where people use handheld devices called PETs to interact with digital avatars known as NetNavis. Players control a boy named Lan Hikari and his NetNavi, MegaMan.EXE, as they battle viruses and other NetNavis in a virtual network to protect the real world from cyber threats. The series combines elements of role-playing games and real-time strategy, featuring grid-based battles where players use cards to execute attacks and abilities. It includes several titles released on the Game Boy Advance and later on other platforms, expanding its storyline and introducing new characters and gameplay mechanics.