Capcom created this side story specifically for Rockman EXE: Operate Shooting Star. Other plot lines from the GBA game like Lan’s oven battle with Mr. Match’s navi and his run ins with World Three meetings are the same.
Somehow, Mega Man EXE and Mega Man Star Force learn to team up for a special move, the Double Rockman program advance.
Even with these additions Rockman EXE: Operate Shooting Star appears to be an expanded port instead of a full remake. The game has the same story as Mega Man Battle Network, uses the same battle system, and reuses most of the sprites.