Mega Man Battle Network 4, known as Rockman EXE 4​ (ロックマンエグゼ4 Rockman EXE 4​?) in Japan, is the fourth game of the Mega Man Battle Network series, released for Game Boy Advance in 2003 with two different versions: Red Sun (Tournament Red Sun in Japan) and Blue Moon (Tournament Blue Moon in Japan). In this game, Lan Hikari and MegaMan partake in a series of NetBattle tournaments.