Revealing mistake: When Beast states that it appears safe to enter the alien ship, his right arm and right leg completely pass through Professor X's body and hover-chair respectively. (00:13:45)
The Phoenix Saga (1): Sacrifice - S3-E3
Revealing mistake: During the opening battle in outer space, when the green ship uses its tail to tear a hole into the larger ship, you can see the tear slightly shift downward. (00:01:47)
The Phoenix Saga (1): Sacrifice - S3-E3
Revealing mistake: After the X-Men rescue Dr. Corbeau and retreat back to the shuttle, they come upon a room with crew members passed out on the floor. Keep an eye on Wolverine in the background on the right side of the screen and you will see him literally walk through a door panel. (00:17:28)
The Phoenix Saga (1): Sacrifice - S3-E3
Revealing mistake: When Cyclops is saying "Can this thing still fly," the purple coloring of the buttons behind him on the left shift up, while their black outline remains in place. (00:17:59)
The Phoenix Saga (2): The Dark Shroud - S3-E4
Revealing mistake: When Jean is saying that she feels strange, the edge of an animation cel is visible moving left and right under her pillow. (00:05:27)
The Phoenix Saga (2): The Dark Shroud - S3-E4
Revealing mistake: When Lilandra is saying to Xavier "I have seen your face a thousand times in my mind," the edge of an animation cel is visible around the parietal area of Xavier's head. (00:20:24)
The Phoenix Saga (3): Cry of the Banshee - S3-E5
Revealing mistake: When Professor X is telling Juggernaut that he is in his mind, if you look closely you can see there is a disembodied mouth on the right side of Professor X's face that is synchronized with his dialogue. Apparently an animation error. Note: this error may only apply to the DVD version of the episode, as it does not occur on the version of the episode that appears on Disney+. (00:04:00)
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)
Savage Land, Strange Heart (1) - S3-E8
Revealing mistake: When Zaladane is helping Sauron escape, she uses her staff to reveal a hidden stairway in the floor. As Sauron descends the steps, the opening fades back into resembling the floor to suggest it is being hidden again, but Sauron fades away as well. It should be that Sauron walks out of view, and then the opening fades back into the floor. (00:02:56)
Savage Land, Strange Heart (1) - S3-E8
Revealing mistake: When Storm is saying "I am free," the flashing green effect on her eyes moves down to her neck when she tilts her head back. (00:12:22)
Savage Land, Strange Heart (1) - S3-E8
Revealing mistake: After Wolverine says "I'll take a smell-see," Jubilee jump-cuts towards him before she begins walking. (00:13:52)
Savage Land, Strange Heart (2) - S3-E9
Revealing mistake: When Storm is saying "Rain, lightning, thunder," the flashing green effect on her eyes sometimes appears on her cheeks instead. (00:02:21)
Savage Land, Strange Heart (2) - S3-E9
Revealing mistake: When Rogue is saving Jubilee and Wolverine from the stampede of dinosaurs, you can see that the dinosaurs behind them are simply gliding across the screen. (00:04:30)
Savage Land, Strange Heart (2) - S3-E9
Revealing mistake: When Beast is checking on Storm, his right foot appears under her left armpit despite the fact that she was lying flat on the ground. (00:19:25)
Savage Land, Strange Heart (2) - S3-E9
Revealing mistake: At various points in the episode, the animation for the flashing red eyes on Garokk's various statues is not synchronized with the physical impression of the eyes on the statues.
Dark Phoenix (1): Dazzled - S3-E11
Revealing mistake: When the Dark Phoenix is saying Cyclops might have to protect Dazzler from her, the glowing yellow effect of Jean's eyes are incorrectly placed around her eyebrows. (00:11:55)
Dark Phoenix (1): Dazzled - S3-E11
Revealing mistake: When Dazzler steps off the stage and walks towards Cyclops, she briefly disappears from the screen. (00:16:20)
The Dark Phoenix (2): The Inner Circle - S3-E12
Revealing mistake: When Cyclops uses his optic beam to blast Leland through several walls, the final wall that Leland goes through already has a hole in it. (00:15:40)
The Dark Phoenix (3): The Dark Phoenix - S3-E13
Revealing mistake: After Wolverine tackles Jean, the glowing effect of the mnemonic scrambler device on her head briefly moves to a different part of her head. (00:15:08)
The Dark Phoenix (4): The Fate of the Phoenix - S3-E14
Revealing mistake: When Xavier is invading Lilandra's mind, the ball of psychic energy on her head shifts left and right as the camera zooms in, likely indicating a composite shot. (00:02:07)
Chosen answer: It says MPO "First Exemplary Printing House" which is a real printing company in Russia founded by Ivan Dmitrievich Sytin in 1889. There seems to be something about "named after..." as well.
Sierra1 ★