Mega Man Battle Network 4.5: Real Operation

Rockman EXE 4.5 Real Operation (ロックマンエグゼ4.5 リアルオペレーション) is a spin-off game in the Rockman.EXE series that was released only in Japan for the Game Boy Advance. Despite its name, 4.5 is unrelated to the mainline games story-wise and has a different gameplay and style than other games in the series. Instead, players can control one of 21 different NetNavis from previous EXE games to compete in NetBattle tournaments. The game is thought to be a “test game” to try out various NetNavis to be playable in later EXE games.

Has a fan translartion.