The Shining Laser is the most powerful weapon of the game. But you can only unlock this almost at the end. So, this is what could happen, if you have it from the beginning. #ExperimentsAndCuriosity #RockmanDASH2 #PS1 #BossRush
It's sad that MML's couldn't let you start a NG+ with all your weapon and gear in Hard Mode. Just reset Rock's life back to normal but keep his weapons you know? Maybe have to max them out again.
In general, the 3 strongest weapons are: Blade Arm (short range), Crusher (middle range) and Shining Laser (long range). I've tested these 3 weapons against all the bosses. Some bosses are more effective with the Blade or the Crusher, but the Laser is the only secondary weapon among these 3, capable of defeat all the bosses. For example, The Bonne train boss ( 13:19 ), is impossible to defeat with the Blade Arm. That's why the Laser is considered the strongest.