Family Ties - S4-E17
Other mistake: When Scarlet Witch falls from the cliff, she lands on a hover craft and kicks its pilot off. The pilot is then immediately show falling into a pond. It then takes Scarlet Witch several seconds to save Quicksilver who was free-falling from the same cliff. Given how fast the hover craft pilot fell to the ground, Quicksilver also would have fallen to the ground before Scarlet Witch could have caught him. (00:16:50)
Family Ties - S4-E17
Other mistake: All of Scarlet Witch's screams in this episode are recycled from Lady Deathstrike screaming in the season 3 episode "Out of the Past, Part 1." (00:16:55)
Family Ties - S4-E17
Other mistake: The final shot of Magneto flying away is a recycled shot from the season 2 episode "Reunion, Part 2." (00:20:40)
Family Ties - S4-E17
Other mistake: This series is in the same continuity as the other Marvel animated series that aired around the same time - Spider-Man, Iron Man, The Incredible Hulk, and Fantastic Four - by virtue of each aforementioned show crossing over with at least one of the other shows. However, in Iron Man, Scarlet Witch has an Eastern European accent, and in this episode she has an American accent.
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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