Continuity mistake: When Fievel is being pursued by a gang of cats, he runs into the museum and tries waking everybody up. At one point his left leg slips itself into his pants between shots. (00:59:35)
Continuity mistake: After Gussie knocks a growling cat in the head from atop the museum marquee, several mice suddenly appear to her right in between shots - tossing various objects at the other cats below. (00:59:55)
Continuity mistake: When the mice are scaling a rope towards the ship bound for America, Fievel - holding onto Papa's tail - stumbles a second time and points out a smokestack coming from the funnel. But at some point between shots, Fievel loses his grip on Papa's tail. (00:08:35)
Continuity mistake: When Tiger and his pals are tearing apart the poker table in search of Fievel, watch the lower right corner of your screen. At some point during the commotion, one cat drops his gray hat and it vanishes into thin air. (00:51:35)
Continuity mistake: When the Giant Mouse of Minsk dives from the pier into the ocean, its head gets submerged immediately. But from the next angle beneath the surface, its head gets submerged a second time. (01:04:25)
Continuity mistake: When a hot coal rolls along the floor towards Papa, he lifts his tail in response. But when the shot changes, his tail is suddenly at rest again. (00:15:00)
Continuity mistake: When Papa is about to give Fievel a new blue hat, he starts off by holding it above the bill with his left hand. But from the next angle, he's seen holding it below the bill instead. (00:04:10)
Continuity mistake: Before Tony and Bridget kiss, he looks into her eyes and says "Cat." But between shots, Bridget's head instantly tilts from right to left. (00:35:15)
Continuity mistake: When Fievel is standing beneath the stove near a hot piece of coal, his hands are placed on his backside. But in the next shot he's seen reaching for his backside just before being burned by the coal. (00:15:15)
Continuity mistake: When Fievel is sitting upon Henri's head during "Never Say Never" his red shirtsleeves rest above Henri's eyes at first, but one shot later the sleeves are wrapped around Henri's chin instead. (00:23:10)
Continuity mistake: After the secret weapon breaks free from Professor Digitalus' Museum, some missing pieces of wood on the door frame reattach themselves. (01:03:10)
Continuity mistake: During "There Are No Cats in America" Papa finishes singing his piece, holding a blue hat in his right hand. But the hat vanishes between shots, right before the first chorus begins. (00:12:10)
Continuity mistake: After Tony whistles at Fievel from atop the Hester Street lamppost, Fievel's blue hat can be seen lying in a puddle. But between shots the hat moves itself onto dry ground. (00:33:25)
Continuity mistake: When Fievel is wandering the streets alone, he finds a small piece of cheese on the ground. But the number of holes in the cheese changes with every shot, right before it gets snatched up by another passerby. (00:30:20)
Continuity mistake: During the rally at Mausheimer Park, Fievel steps up to the podium and whispers a plan into Gussie's megaphone. When Honest John asks to hear it, Gussie can be seen holding the megaphone's handle with three fingers as she speaks to him. But once the shot changes, she suddenly has only two fingers on the handle. (00:45:20)
Continuity mistake: After Fievel sinks his teeth into Warren T. Rat's left arm from behind a mirror, he howls in pain. In this shot, the reflection of Warren T.'s teeth isn't reversed like it should be. (00:51:25)
Revealing mistake: During "Never Say Never" Henri instructs Chantal to fly Fievel to immigration where he should be able to find his family. At one point during this shot, Henri's right wing casts no shadow on the Statue of Liberty - only an outline of the wing's shadow is visible. (00:23:25)
Continuity mistake: At the beginning when Tanya is looking into a mirror admiring her new orange headscarf, she turns completely around towards the dining room between shots. (00:03:55)
Continuity mistake: When Henri and Fievel land upon the Statue of Liberty during "Never Say Never", the statue's tablet is positioned right up against the cloak. But one shot later the tablet is extended far out into the air instead. (00:22:10)
Continuity mistake: In the sewer where Fievel is trying to evade the cats - at the point where he's on a roller skate heading downhill into the path of a live bear trap - several notches on the skate's belt disappear between shots. (00:52:10)
Answer: Warren T. grabbed Tiger and told him he was fired.Tiger did eventually leave some time after that though.