Capcom has announced that it will release Mega Man Battle Network 4 in the US in two versions this summer. Titled Red Sun and Blue Moon, the two GameBoy Advance titles will support the link feature via Nintendo's Game Link cable. Centered around a tournament-style gameplay, they will feature two new system called "Soul Unison" and "Dark Soul". The former allows Mega Man to use certain skills acquired from defeated enemies, whereas the latter offers powerful chips, which should be used with great care. Frequent usage will result in Mega Man being drawn to the dark side, resulting in him not being able to perform soul fusions anymore.

Mega Man Battle Network 4: Red Sun and Blue Moon will be available in the US this summer.