Mom Bomb is fought as the boss of Mt. Hobs. It begins as a normal battle against a Bomb until it loses 1,500 HP, in which case it will transform and will do nothing but countdown to Explode, in which case it will deal heavy damage to the party and split Mom Bomb into three Grey Bombs and three Bombs.
Mom Bomb returns as the boss of Mt. Hobs, being identical to its previous incarnation.
While known as Mother Grenade in the Japanese version, it is known as Mom Bomb in the English releases.
Mother Bomb is an enemy fought at Kilanda Islands, being the upgrade to the Ice Bomb. It is identical to the Ice Bomb, but hits harder and is harder to pick up. In addition, when it uses Self-Destruct, it can inflict Freeze onto anyone caught in the blast, leaving them vulnerable to other enemies that may be around.
Mom Bomb is not an enemy, but a summon for the first time in this installment.