Rockman Exe 4.5 Real Operation Title Key !full! -

Here's a brief story summary:

No discussion of the Rockman EXE 4.5 Real Operation Title Key is complete without mentioning the fan translation. For over a decade, the game was unplayable to non-Japanese readers because the Title Key menus were dense with kanji.

by Prof. 9 and others, there is a specific button combination used on the title screen to unlock a secret boss battle. Bass XX Fight:

It binds your save data to the GBA’s internal clock.