Digital Devil Story: Megami Tensei II Fusion Calculator

Fusion rules

1. Two-demon fusion checks the special pairs first, then the elementals, then the race chart.
2. An elemental fused with a demon of the race on its row moves that demon up one rank in its race. Past the top of the race it comes back to the bottom. Any other elemental pair uses the race chart.
3. Otherwise the race chart gives the result race. The result level is the average of the two levels, rounded down, and the result is the weakest demon of that race whose level is at least the average, or the strongest one when none reaches it.
4. The race chart and the elementals never give Lucifer, Baal, Ahura Mazda, Orthrus, Atlas, Naga, Sword Knight.
5. Three-demon fusion takes only demons of these races: Element, Holy, Genma, Divine, Kijin, Avatar, Deity.
6. Three elementals make the demon of their trio in the table below, and any other trio of elementals makes Pixie. Three demons of one other race make the fixed demon of that race.
7. Two of one race and one other: the odd one moves down one rank and stays in its race. Sphinx becomes Barong instead.
8. Three races with one elemental: the other two use the race chart at the average of all three levels, rounded down, and a sum over 255 starts again from 0. When that picks the elemental itself, Salamander gives Earthy Slime and any other elemental tries again one level higher.
9. Three races without an elemental use the three-race table below, and a trio not in it makes Pixie.
10. The result is refused when its level is above the hero's level. The moon phase does not matter, and fusion never has an accident.

Race chart

Find the first demon's race on the left and the second's along the top. The cell is the race of the result.

Special fusions

Elementals

Fused with a demon of the race shown, each elemental moves that demon up one rank.

Three elementals

Three of one race

Three races