Kaboom is learned by the Princess of Moonbrooke at level 19. The spell costs a mere 8 mp, but deals only 55~68 in the original version and 68~92 in the remakes and ports
Kaboom is learned by Magi and Sages at level 38, and deals between 140~160 points of damage. It costs 18 magic points to cast.
Deals 120~160 damage, and costs 15 magic points.
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Kaboom can only be obtained by mastering the Sage vocation. It has been reduced in velocity slightly, dealing between 130~150 damage for 15 mp.
Kaboom has the same aspects as in the previous game and is learned through the same method.
Kaboom is learned by Jessica at level 33, with a base range of 104~120. Once Miss Albert's wisdom surpasses 251 the spell will gradually increase in power, until her cognitive prowess peaks at 556. From there the spell will blast all enemies for 184~200 damage.
- The spell has been given a damage boost in the 3DS port, with the base range growing to 112~128 and the upper limit reaching 208~224. This zenith requires a wisdom score of 620 to reach.
Kaboom is available to Mages at level 47 and Sages at level 48. It costs 28 MP to cast and will deal 140 base damage, improving once the sorcerer's magical might reaches 250. The upper limit of this spell is 218~238.
Magi and Sages will learn Kaboom at level 68, and can cast it for 23MP. The high limit is 252~264, with the lower ranges calculated as Magical Might x 0.26 + 45.
Veronica will learn Kaboom at level 57, and can cast it for 24 MP. The base damage is 156~172, slowly rising to a maximum of 262~278.
Explodet is learned by monsters beginning at level 29 if the monster has at least 120 MP and 158 Intelligence. It is learned naturally by Blackmar, ArcDemon, Balzak, Baramos, Endentured Servant, Silencing ram, Hargon, Liquid Metal Slime, and Nimzo. 
Kaboom will deal 60~80 damage when cast by an enemy in III, 72~88 damage in IV and V, and 95~115 in VI, VII and IX. The blast radius was weakened in VIII, where it deals 72~92 damage.