You either get the screen flooded with copies of the boss.
These guys are dicks in the highest order.
Even with his weakness, he's still very, very difficult. Moving onto the 16bit era, Slash Man is probably one of the hardest Robot Masters in the series.Gameboy Bright Man? No such trick, just the Random Number God deciding whether you win or not. NES Bright Man is cheap, unless you know the secret to his Flash Stopper.Oh and Quick Man's in this and the screen size is tiny, so. This gets inverted for the Gameboy version, where he does little damage, and now Cut Man of all bosses is the now asshole boss of the group. Elec Man would count if he didn't die in three hits to his weakness, cause he hurts.Special mention goes to Doc Wood, and Doc Air, the former because his leaf shield is now huge and the battle takes ages, and Doc Air has all the problems Airman usually has (such as one undodgable attack), with the unfortunate addition that he's more durable than Airman by a long shot.
And his weakness is also the worst weapon to actually try and hit him with. Doc Quick: because he's a) huge, and b) durable. So, yeah, guess you should really use Master weapons against him. And now his has hit invincibility on top of that. No longer does he take 2 damage from a buster shot.