Hyper Bomb

Hyper Bomb (ハイパーボム) is Bomb Man's special weapon from the first Mega Man game. When Mega Man uses this weapon, he throws beachball-sized bombs in a small arc (so it takes some practice to get used to throwing them). There's a small time delay between when a bomb is thrown and when it explodes, but it has a decent-sized explosion that damages or destroys anything within the blast.

Damage Data Chart
Known damage values for the original Mega Man.

Bosses Weak Against Hyper Bomb

 * Guts Man: Mega Man
 * Copy Robot: Mega Man
 * Buster Rod. G: Mega Man: The Wily Wars
 * Mega Water. S: Mega Man: The Wily Wars
 * Hyper Storm. H: Mega Man: The Wily Wars
 * Wily Machine 3: Mega Man: The Wily Wars
 * Ice Man: Mega Man: Powered Up

Bosses That Can't Be Attacked By Hyper Bomb

 * Yellow Devil: Mega Man
 * Wily Machine: Mega Man
 * Buster Rod. G (2nd Encounter): Mega Man: The Wily Wars
 * Fire Snakey: Mega Man: The Wily Wars
 * Wily Machine 1 and 2: Mega Man: The Wily Wars

Other media
Mega Man uses the Hyper Bombs in the first episode of the Mega Man animated series. Mega Man obtained it after trapping Bomb Man in the indentation of a wall momentarily with a Mega Buster shot, allowing him an opportunity to take the weapon. Upon it being copied, Bomb Man tried to run away, but Mega Man hit him from behind with a fired Hyper Bomb, blowing him to pieces with the explosion, before being recovered by Doctor Wily.

Interestingly, the bombs were fired from Mega Man's buster rather than thrown, and its firing mechanism had a wide barrel and contained two circular chambers, probably to hold the bombs. 

Artwork
