Game Boy Advance
As with the previous game was released as Mega Man Battle Network 4 in two
versions, Red Sun and Blue Moon. And just as in the previous game contains the
various bosses, and therefore different Battle Chips.
The game is basically the same, but also introduces the so-called "Soul Unison,
which forbid MegaMan.Exe merge with another PET and thus take a new powerful
form. Every Soul Unison has its own strengths and skills, but they also have
some weaknesses that will be noted.
In addition to depending on which version you have, get help from various PETS
in their hunt for computer viruses.