RockMan Zero Cheats (GameBoy Advance)

After completing the game, you can start a new game in Hard Mode by holding the Left
Shoulder Button down while starting a new file. In Hard Mode, weapons do not gain levels,
and bosses have new attacks.

After completing the introductory level where Zero gets his Sword and Pistol, get on the
teleporter and teleport back to the base. Immediately exit the place by trying to climb
the ladder you are in front of. Ciel will talk to you, and give you several options to
select. Keep selecting the first choice she gives you on each option and you will be
teleported to a junkyard level. In the middle of the level there will be these pillars
that will keep growing back after each segment is destroyed. You can keep destroying the
segments with the Sword and Pistol and they will level-up. Keep destroying the segments
until the Sword and Pistol are at their maximum levels.