Continuity mistake: When Zander holds out the going away card for Miles to sign, the card flips over within his hand between shots, note Zander's four fingers are on the card's front then the back. (00:05:35)
Continuity mistake: Right after the scene where Nels saws up his gun, he walks into a store with his arms folded. His hands are down close to his stomach. When it cuts to the next angle, they are much higher at his chest. (00:26:51)
Continuity mistake: The new Bosley goes for a hug after reporting Edgar's demise. You can see as the hug begins that the sunglasses are not in Elizabeth Banks ' left hand, but it's where they end up when she says that "hugs work." (00:27:50)
Continuity mistake: When Major Ben Daimio is saying the line about putting Hellboy back in his cage, he's walking towards an elevator door mid sentence and looking at the door. The camera cuts to a different angle as he finishes this sentence and suddenly his head has turned 180° with him looking at Hellboy instantly between shots. (00:41:55)
Continuity mistake: Dr. Stone mentions there is an emergency exit below the landing pad. He then asks the pilot if there is a camera underneath. In this shot, the pilot has his eyes partly closed and his lips pursed together. It cuts to a close up of him and suddenly his expression is different, with his eyes wider open and his mouth open. (00:19:50)
Continuity mistake: When Sasha is jumping from the stairs at the end, she is wearing black tights, but before and after she is wearing different tights.
Continuity mistake: En route from the front door of Wayne's mansion to the table in the Batcave, the pile of pizza boxes in Alfred and then in Mike's hands continues to change in size and number: at first the pizza girl delivers 11 boxes, Mike slams on the table just 8, but he brought down the stairs twice that amount (without counting through freeze-frame the precise numbers, it's simply obvious at first glance that the pile is bigger in some shots and the pizzas themselves are pictured of inconsistent size).
Continuity mistake: Batman enters Lex Luthor's room at night while he's sleeping, and completely casts a shadow over Lex. This wakes Lex up and he sits up. Batman has not moved from his position, but now in the next shots he is no longer casting a shadow on Lex's bed or body. (00:24:47)
Continuity mistake: After the wolves have killed the guy poorly sniping them at the old encampment location, Clair Hamilton glares at Larsen from her sitting position and moves towards him to ask more about what he just said about Father. During this sequence, Gina Carano's hat is burdened by a bit of snow or practically no snow at all, back and forth with no logic between cuts. (00:35:50)
Continuity mistake: When Nicole is telling Stu that he might as well call his gym "Old Hag Bikes", he is looking at her and smiling. It cuts to a close up of him and suddenly he's looking slightly up and off to the side with a pondering face. (00:53:25)
Continuity mistake: When Monster Zero is standing victorious over the Mexican city, a traffic light changes from red to yellow.
Continuity mistake: In the first movie, it is stated that the program was started in the '50s, but in this one it is stated that Gustave Eiffel was an MIB agent. He died in 1923.
Continuity mistake: When Ash and friends are entering the wharf, there are two people that change between shot. There is also a person who goes from having his right hand in his lap to having it scratching his head. (00:23:06)
Continuity mistake: Xiao Meng spent some time wrapping her father's (Professor Tao) left hand, going around his wrist/thumb and under his thumb (diagonally across his palm). When Tao was blown off the bridge and landed in the dirt, the bandage was NOT wrapped around his thumb (just around his wrist). (01:12:33 - 01:16:03)
Continuity mistake: At the start of the film, a man is giving a tour of a building under reconstruction to some potential buyers. One shot, as he's telling them that this sits on a 14-acre lot, there are just 3 people as they walk through a doorway. The film jump cuts to a closer angle, and suddenly a 4th person appears in front of them from thin air. (00:02:34)
Continuity mistake: The lamp above the picture on the wall at the karate school/studio changes in appearance a few times. The first time Casey visited the school, the light bulb was covered by the lamp shade (which was aimed toward the picture); the bulb was not visible but it cast light onto the picture. When the picture was blurred behind Sensei, there was a round circle totally outside of the shade to represent the light bulb (which should have been inside the lamp shade and not visible). (00:15:30 - 00:27:17)
Continuity mistake: When Nicolas Cage aka Frank Walsh first shoots a blow dart at Kevin Durand aka Richard Loffler he hits him in the left shoulder. Ten seconds later Kevin he pulls the dart out of his right shoulder. (01:23:15)
Continuity mistake: After take-off, Mr. Anderson's hair changes a few times while he was talking to Rochelle. His bangs are combed back, but then he has strands hanging down his forehead and the top of his hair is dishevelled. After the camera shifts to Rochelle and back, Mr. Anderson no longer has the strands down his forehead but the right side is messy. When the camera shifts again, Mr. Anderson's hair is neatly combed back. (00:14:54 - 00:15:25)
Continuity mistake: Kim uses her laser lipstick to carve a hole in the skylight of Drakken's lair. You can see her trace a mostly regular arc, almost perfect in the 3-6 quadrant, but in the reverse shot, that part of the cut is all bumpy. (01:09:25)
Continuity mistake: When the guy leaves the motel, he only grabs his jacket, but when he's outside, he has a helmet in his hand. (01:14:55)