Other mistake: The description of Alastor's Hood states that it can be used to Haunt a foe, however when used, it will attempt to Condemn a foe for an instant kill instead.
Continuity mistake: When you first meet the Doom Dragon on top of the Mars Lighthouse, its red head is on the left. When you actually battle the Doom Dragon, its red head is on the right. You see it both times from the front, so it's not an angle issue.