The Navarm Bomb (ナパームボム, Napalm Bomb, in Japan) is a bomb that sprays lava in four directions. The lava then becomes pillars of fire for a few seconds.
This bomb is mainly used to destroy tough pieces of metal that pose as obstacles. Destroying these pieces will either open up areas or rooms on the map or reveal items hidden inside it. This bomb can also be used to wipe out enemies quickly since it does a lot of damage and lasts longer than the regular Fire Bomb.