Drill Bomb

Drill Bomb (ドリルボム) is Drill Man's special weapon. It can pierce barriers (though barriers are only known to exist in sections 2 and 4 of Dr. Cossack's castle). Also, Mega Man can set the explosion off early when pressing the attack button after a drill is fired. Drill Bomb can also destroy Garyobies. It is Toad Man's weakness, and one of the few weapons capable of damaging the Wily Machine 4's second form.

Damage Data Chart
Known damage values in units for Mega Man 4.

Capacity
In both Mega Man 4 and Mega Man III, one Drill Bomb uses 1 weapon energy unit. With a full weapon energy gauge, it can be used 28 times in Mega Man 4 and 19 times in Mega Man III.

Bosses weak against Drill Bomb

 * Toad Man: Mega Man 4
 * Wily Machine No. 4 (form 2): Mega Man 4
 * Dust Man: Mega Man III

Other media
Mega Man uses the Drill Bomb in the Mega Man animated series, however he only uses it to disable Proto Man's buster and does not use its exploding function, assuming it was retained for the show.