Other mistake: When the Blob picks up the bucket of ice cream, he says "Oh boy, tutti frutti!", but the label on the bucket says "Vanilla." (00:03:50)
Continuity mistake: When Rogue first wakes up from her nightmare, the X emblem on her chest is red. A couple of shots later, it is black. (00:05:15)
Other mistake: After Rogue knocks Gambit over, Gambit is in the foreground and Rogue is in the background. Despite this, the heel of Rogue's right boot appears in front of Gambit's left foot. (00:06:32)
Continuity mistake: When Rogue collapses to her knees in front of Cyclops, the X emblem on her chest is colored red, when it should be black. Additionally, the X emblem is missing from the middle of Cyclops' belt. (00:06:55)
Continuity mistake: When Rogue is crashing through several levels of the mansion, the last one she crashes through is Storm's greenhouse and you can see through the windows that it is light outside. When she crashes through the ceiling of the mansion a split second later, it is suddenly dark outside. (00:08:15)
Continuity mistake: When Rogue is flying towards the torch section of the Statue of Liberty, the flame portion of the torch is missing, and then appears in the next shot. (00:08:33)
Factual error: Whenever the comatose Carol Danvers is shown in her hospital bed, she is wearing a pink turtleneck. A coma patient wouldn't be dressed in their own personal clothing. It could obstruct doctors and nurses in an emergency. She would be wearing a hospital gown. (00:09:19 - 00:20:45)
Continuity mistake: When Rogue walks by Carol Danvers' hospital room, you can see a nurse in the open space between the open door and the door frame. When the shot changes, the nurse is now standing in front of the open space, and would have been at least partially obscured by the door in the previous shot if she was standing in the same place. (00:10:11)
Continuity mistake: When Mystique is telling Wolverine, Cyclops and Gambit that they stole something very important from her, the sclera of Gambit's eyes are white, when it should be black. (00:10:36)
Continuity mistake: When Cyclops, Wolverine and Gambit are evading the fire lion that Pyro created, Cyclops hops over a blue-green car. A couple of shots later, the car is now brown. (00:10:56)
Continuity mistake: In the flashback of Rogue's father disowning her, when he says he's ashamed to be seen with her, the number of stripes on the flag on his hat decreases from six to four in the same shot. (00:13:08)
Continuity mistake: When Ms. Marvel first appears, her reflection is through the front window of the plane that Rogue is stealing. The lightning bolt design on her outfit and the red sash around her waist are not reversed in the reflection like they should be. (00:14:11)
Continuity mistake: When Rogue and Ms. Marvel crash-land into the ground, Rogue pushes Ms. Marvel to the side, with Ms. Marvel's hair being near the edges of the hole in the ground. When the shot changes, the edges of the hole are still in shot, but Ms. Marvel's hair is nowhere to be seen. (00:15:31)
Continuity mistake: When Pyro is unmasking Ms. Marvel, the wristband on Blob's right arm is missing. (00:15:37)
Audio problem: When Jean Grey exclaims "No!" after Ms. Marvel says "This ends now," she is speaking in Ms. Marvel's voice. (00:18:59)
Continuity mistake: When Rogue is visiting the comatose Carol Danvers in the hospital, Danvers' hair is parted down the middle and her bedsheets go all the way up to her neck. A couple of shots later, she has a lock of hair going down the middle of her forehead, and her sheets only go up to around her armpits. (00:20:17)
Factual error: At the end of the episode when Carol Danvers is shown comatose, there is an EEG machine next to her bed. This machine monitors brain activity and uses electrodes on the patient's head in doing so. She has no electrodes placed on her head, and the machine isn't detecting activity in her brain. (00:20:37)
Plot hole: In the season one episode The Cure, when Pyro and Avalanche are in the bar on Muir Island waiting for Mystique to arrive, Avalanche says "This friend of yours better show up soon or I'm going back to jail, just for something to do!" Rogue then comes in and Pyro suggests to Avalanche that Rogue could be Mystique, to which Avalanche responds "What do you mean it could be? Don't you know what she looks like?", leading Pyro to tell Avalanche that Mystique is a shape-shifter. This dialogue implies that Avalanche has no idea who Mystique is, which is further substantiated when Pyro and Avalanche kidnap Mystique later in the episode while she is in the guise of Dr. Adler, and Avalanche didn't recognize Mystique when she revealed her true form. However in this episode it is shown that Pyro and Avalanche were both previously members of Mystique's Brotherhood of Mutants, so Avalanche should already know who Mystique is without Pyro having to tell him. Rogue was also a member of that group yet neither Pyro nor Avalanche recognize her.
Other mistake: During a flashback, Rogue is shown absorbing Pyro's mutant power and then creating fire out of thin air. However, Pyro does not have the ability to create fire, he can only control it. That's why he wears a flamethrower on the back of each hand.
Continuity mistake: When Beast and Dr. Bohlson enter Carly's room, there is no breast pocket on Dr. Bohlson's labcoat. A couple of shots later, his labcoat now has a breast pocket with two tongue depressors in it. (00:02:25)
Answer: Chris Potter, the original Gambit voice actor, did indeed quit the role in the 4th season. His last episode was The Phalanx Covenant Part 1 so it seems reasonable that Fox would limit the use of the character even though it was recast. It doesn't appear that Potter left the role due to animosity, he stated in an interview that he wished to play Gambit in the first live action X-Men film.
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