Epic War 3Edit
In Epic War 3, Great Diablos is unlocked by completing Cave of Trial 3. Great Diablos also appears in the battle with the final castle if the final battle is against Trevquez De Revierre, or Grullborg Grimtooth.
Epic War 4Edit
In Epic War 4, Great Diablos must be purchased instead of unlocked.
Epic War 5Edit
In Epic War 5, Great Diablos is called the Earth Dragon. The Earth Dragon is the boss in Extra Stage 3, and is unlocked by completing Trial 2.