The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Black Tom Cassidy attacks Xavier from behind, the window is adorned with pink drapes. Moments later after he knocks out Lilandra, the drapes have disappeared. (00:04:27)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Xavier is telling Lilandra that Juggernaut's body is invulnerable, the destroyed TV is just on his left. When the shot changes, he is now directly in front of the TV. (00:03:27)
The Phoenix Saga (2): The Dark Shroud - S3-E4
Continuity mistake: When Gambit is saying "Wolverine, what's happening," the sclera of his eyes are white, when they should be black. (00:12:16)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Phoenix is telling everyone that the crystal is sealed, Rogue is standing behind Wolverine and Cyclops. A couple of shots later, she is several feet in front of them. (00:17:42)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When the image of the X-Men are shown on a tree, Gambit's pants are the same blue color as his boots, when they should be black. (00:17:02)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: After Jean says goodbye to Cyclops, Wolverine's bare arms are the same yellow color as his outfit. (00:16:39)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Xavier is first shown watching the clips of the destruction happening across the planet, he is wearing a jacket and gloves. When he is shown again around 30 seconds later, he is now wearing a suit and tie. (00:11:20 - 00:11:54)
The Phoenix Saga (5): Child of Light - S3-E7
Continuity mistake: When Jubilee rushes to Xavier to tell him about the black hole sun, Banshee's cape is suddenly missing. (00:06:32)
The Phoenix Saga (4): The Starjammers - S3-E6
Continuity mistake: When Cyclops and Corsair are boarding D'Ken's ship via the moving sidewalk, the speed at which the moving sidewalk is propelling them forward varies depending on the shot. (00:15:03 - 00:15:29)
The Phoenix Saga (4): The Starjammers - S3-E6
Continuity mistake: When D'Ken is berating Erik the Red for being defeated by the X-Men, he is sitting on a throne. He then stands up and calls Erik the Red a fool, and when the shot changes, the throne disappears. (00:09:47)
The Phoenix Saga (4): The Starjammers - S3-E6
Character mistake: When Raza is firing the recalibrated stun ray at the X-Men, the control panel misspells "target" as "tareet." (00:08:10)
The Phoenix Saga (4): The Starjammers - S3-E6
Other mistake: When Captain Britain is shown flying by the Elizabeth Tower, the two clocks visible are displaying different times. The clock on the left is showing roughly 12:10, while the clock on the right is showing 12:00. (00:04:50)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Gladiator is landing at Cassidy Keep, Jubilee, Gambit, Wolverine and Banshee are spaced apart. When the shot changes, they are standing side by side. (00:16:43)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Revealing mistake: When Wolverine is trying to break out of the crystal entrapment, a yellow box appears on screen for a few frames that says "Cut out these frames." (00:15:58)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Wolverine is first shown detecting scents in Xavier's room, the glove on Gambit's right hand is the same color as his flesh. (00:11:25)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Continuity mistake: When Juggernaut throws Xavier out the open window, Xavier is shown going through roughly the middle area of the open space. When he is flying through the air from Banshee and Moira's perspective, he is falling from a higher position. (00:05:02)
Revealing mistake: When Beast is entering Carly's room to see if her procedure was a success, he passes through the door frame. (00:11:08)
Continuity mistake: When Pyro is unmasking Ms. Marvel, the wristband on Blob's right arm is missing. (00:15:37)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Forge is first shown standing in front of the tube containing Wolverine's skeleton, the skeleton is incorrectly shown to be around 7 feet tall (Wolverine is only 5'3"). A couple of shots later, the skeleton is now shown to be more accurately sized. (00:05:19)
Time Fugitives: Part 1 - S2-E7
Continuity mistake: Throughout the episode, Bishop's goatee alternates between fully covering his chin and having a small spot of exposed skin beneath the soul patch. Sometimes there is even the outline drawn of the exposed skin beneath the soul patch, but it is colored the same as the goatee. (00:05:10 - 00:20:05)
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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