Mega Man Battle Network 4: Blue Moon

It's been rather quiet after Lan and Mega Man defeated the WWW in Mega Man Battle Network 3. Little do they know that they're about to embark on yet another adventure. An asteroid has been spotted in outer space which is heading towards Earth, and scientists are planning to destroy it with a giant laser. In addition to this, a mysterious Navi called ShadeMan is terrorizing the Internet, sucking the life out of other Navis, much like a vampire. Can Lan and Mega Man stop this new threat? Mega Man ...