Jet Bomb

Jet Bomb (ジェットボム) is an exploding enemy in Mega Man 5 that appears in the stages of Napalm Man and Star Man (as well as in Mega Man for the Game Gear). When it is shot, it explodes, sending debris in four diagonal directions toward Mega Man. If it hits a wall, however, it will send three pieces of debris in a spread pattern instead.

It appears in Napalm Man's Stage, as well as the 1st Wily Skull Cruiser Stage in Mega Man IV

Trivia
In the early version of Mega Man 5, there was likely a prototype of the Jet Bomb, which looked completely different.It was something, that resembled a flying grenade, that would explode and split into pieces if it would hit Mega Man or a wall,just like the final version. It's still unknown why the design was changed. More info on it can be found at tcrf.net/Mega_Man_5