It is the upgrade to the Thunder Bomb fought previously, and fights identical to it. The only difference is it deals much more damage than its predecessor, but it can be fought in the same manner. Reduce its HP to about 50%, then let it use Self-Destruct away from the player. If the player is caught by the explosion, they will suffer heavy damage as well as the Paralysis status, so be wary!
Etymology
[view·edit·purge]A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy.