Continuity mistake: After Carmella Unuscione releases Wolverine and Rogue from her psionic grasp, Wolverine's face is colored blue. (00:15:00)
Beyond Good and Evil: Part 1 - S4-E8
Continuity mistake: A giant stone is covering the secret door to Apocalypse's Lazarus Chamber. After Cable presses the snake lever to open the door, the giant stone has disappeared. (00:03:35)
Beyond Good and Evil: Part 1 - S4-E8
Continuity mistake: The cake frosting on Cyclops and Jean's faces goes from being to just around their mouths to all over their cheeks. (00:10:50)
Beyond Good and Evil: Part 1 - S4-E8
Continuity mistake: The crowd of animated extras that are on the mansion's porch have suddenly disappeared when Jean and Cyclops get in their car. (00:11:35)
Beyond Good and Evil: Part 1 - S4-E8
Continuity mistake: When Hairbag knocks Wolverine down, Rogue can be seen lying on the ground next to Storm. A couple of shots later she is shown lying next to Gambit. (00:12:40)
Beyond Good and Evil: Part 1 - S4-E8
Continuity mistake: Gambit and Beast have instantly appeared behind Wolverine after he asks how the Nasty Boys got inside the mansion. (00:17:55)
Beyond Good and Evil: Part 2 - S4-E9
Continuity mistake: Deathbird's wings alternate between being red and purple after Apocalypse betrays her. (00:05:05)
Beyond Good and Evil: Part 2 - S4-E9
Continuity mistake: The length of the chain attached to the collar of Archangel's guard dog varies. When the dog is first shown, the chain is only shown to be around three feet long. When the dog discovers Psylocke, it is able to run several feet towards her and away from the wall where it was chained up. (00:09:35)
Beyond Good and Evil: Part 2 - S4-E9
Continuity mistake: When Psylocke renders Archangel's guard dog unconscious, his chain is still attached to his collar. When Archangel checks on the dog, the chain is missing. (00:09:50)
Beyond Good and Evil: Part 2 - S4-E9
Continuity mistake: Sabretooth tears off a piece of Psylocke's clothing, yet there is no sign of any part of her clothing being torn afterwards. (00:14:45)
Beyond Good and Evil: Part 2 - S4-E9
Continuity mistake: When Mystique first impersonates Shard in order to fool Psylocke, both Mystique and the real Shard are missing the gun holster that is usually on top of Shard's right shoulder. When Pyslocke and Wolverine both state that they can see through Mystique's deception, the gun holster has suddenly appeared on Mystique's right shoulder. (00:15:50)
Beyond Good and Evil: Part 2 - S4-E9
Continuity mistake: Magneto straps Wolverine to the port side of a boat and then drops the boat on a warehouse. When Gambit is freeing Wolverine, Wolverine is suddenly on the starboard side of the boat. After Gambit frees Wolverine, they are both shown to be on the boat's port side. (00:17:00 - 00:18:00)
Beyond Good and Evil: Part 2 - S4-E9
Continuity mistake: When Storm is clearing the debris of the destroyed warehouse, Sabretooth is nowhere to be seen. A few shots later Sabretooth is visible. Sabretooth was unconscious so he could not have moved into view on his own. (00:17:55)
Beyond Good and Evil: Part 3 - S4-E10
Continuity mistake: When Bishop is observing Cable and Tyler from the Axis of Time, his goatee is colored a lighter shade of gray compared to its usual bluish-gray. (00:02:55)
Beyond Good and Evil: Part 3 - S4-E10
Continuity mistake: When Cable says "You're boring me..." to Xavier, Cable's gun is missing. It reappears in the next shot. (00:08:20)
Beyond Good and Evil: Part 3 - S4-E10
Continuity mistake: When Cyclops and Cable are arguing about the course of action to take, Cyclops is on the viewer's left and Cable on the right. When Wolverine interrupts them, they have swapped sides. (00:10:25)
Beyond Good and Evil: Part 3 - S4-E10
Continuity mistake: When Cable is ordering Xavier to probe Sabretooth's mind, Sabretooth's normally-brown headgear is flesh-colored. (00:10:50)
Beyond Good and Evil: Part 3 - S4-E10
Continuity mistake: When Cable is ordering Xavier to probe Sabretooth's mind, Cable is carrying his gun in his right hand. When the shot changes, Cable is no longer holding his gun. (00:10:55)
Beyond Good and Evil: Part 3 - S4-E10
Continuity mistake: When Beast is asking Xavier what he saw in Sabretooth's mind, Beast is missing the "X" symbol from the center of his belt. (00:11:10)
Beyond Good and Evil: Part 3 - S4-E10
Continuity mistake: When Beast opens up the entrance to Apocalypse's pyramid, the "X" symbol on his belt that is normally black on red is now red on yellow. (00:15:15)
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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