Other: When the auction show is attacked the power goes out and the emergency lights come on, yet the television screens stay on?

Continuity: When Hellboy has been speared in the chest and fallen to the ground, the POV shot of Nuala and Nuada has been turned so their heads are at the right hand side of the frame – from Hellboy's point of view their heads should be to the left.

Continuity: In the first Hellboy movie, when they first show the BPRD headquarters, it reads "Newark, New Jersey". In Hellboy II, they show what is clearly the same highly distinctive building, but it now reads "Trenton, New Jersey".

Continuity: After the golden army bots awaken, it zooms out to show how big the army is, when they do the prince and princess disappear in the background, then reappear.

Continuity: The first time you see the Prince Nuada out of puppet form, there is a continuity shift on his hair when he slams the spear on the ground.

Continuity: In the scene where Hellboy and Abe are getting drunk by Liz's bed, one shot shows the tab on HB's beer can pointing up. In the next shot, the tab is folded down.