Continuity mistake: Willy Wonka is bobbing his head to the Oompaloompa song in the nut room. But when the shot pans out, he is perfectly still.
Factual error: Dusseldorf does not, nor has it ever, looked like the quaint place shown in the film. The caption does get quite a laugh from German audiences, though. The place shown is the town of Gengenbach.
Continuity mistake: When Veruca is choosing a squirrel, she heads for the last one in line, furthest from the ladder. Then after it cuts away and back, she is headed towards the middle of the line, but then she is headed for the last one again. When the squirrels jump her, she is about 1/4 of the way down the line, starting from the ladder.
Continuity mistake: The jacket that Violet wears has a zip. However, this zip disappears without trace once she is a blueberry, and remains missing for the rest of her existance as a blueberry. Violet's body was done in CG animation, so it could not be that Violet had to change into a different costume. There was no reason why the zip couldn't remain, it just seems like the CG makers got tired of it being there.
Continuity mistake: After Augustus Gloop falls into the chocolate river, he gets sucked into the current of the pipe. At one point in the scene, a yellow bush seen in the background is moved back and forth by the current, but after the next cut, it is seen motionless.
Continuity mistake: When in the Chocolate Room, Mike Teavee crushes the pumpkin into three pieces. It then zooms out and shows him crushing it into three pieces again when Mr. Teavee comes up.
Continuity mistake: On Charlie's birthday night he breaks up the chocolate bar into pieces and gives them to his family, when he gives a piece to his father the piece is in two pieces but when his father starts eating it, it is in one piece.
Continuity mistake: When the factory gates open for the contest winners, the shadows in the courtyard change between shots. [This is a reference to the first film in which the shadows shift a lot. It is also shown in other parodies of the original film, eg, the Family guy episode "Wasted talent". Still a valid mistake.]
Plot hole: In the end of the movie, when Willy Wonka decides to visit his father, his father does not recognize him until he looks at his "rare teeth." But the wall of newspaper printings that Charlie was looking at included a recent enough picture of Willy that the father would have definitely recognized him, before seeing his teeth, as Willy doesn't look like a normal person with that outfit.
Deliberate mistake: Charlie's room has a hole big enough for him to climb out of in the ceiling. I know it is to show just how poor the family is, but we see he has only a thin wool blanket for warmth. He would have frozen to death in his sleep during winter by now.
Continuity mistake: When Mike Teavee has been sent by television, Wonka is pointing to the screen when the camera is showing outside the screen, but a split second later, when the camera is showing inside the screen, both of Wonka's hands are leaning on his cane.
Visible crew/equipment: Throughout the movie, whenever somebody has glasses on, it is quite easy to see the crew in the reflection of the glasses. This is most obvious in the television room but is visible in other scenes too.
Continuity mistake: Just after Violet Beauregarde has been rolled away by the Oompa Loompas, Willy Wonka appears next to Mrs. Beauregarde and tells her how they've tried it on several Oompa Loompas, they all ended up as blueberries and that it's "really weird." When he finishes speaking he is smiling, and the camera immediately cuts to a shot of Wonka and Mrs. Beauregard from another angle, and he's not smiling anymore, with no time to change between shots.
Continuity mistake: When Dr. Wilbur Wonka is checking Willy's teeth using the dental pick and mirror, the view from inside Willy's mouth shows Dr. Wonka holding the mirror differently in his left hand from the shots of his left hand outside Willy's mouth.
Revealing mistake: At the beginning of the song about Mike Teavee, it can be seen that the reflection of the shrunken Mike on the glossy table is not actually his reflection but rather a mirrored and flipped version of the footage.
Continuity mistake: The Chocolate Room features a chocolate fall, which had to be technically enlarged to fit the room. In one shot, right after the people enter the room, however, the chocolate fall is shown only being half of its actual size.
Other mistake: In the Nut Room, there are doors on the left and the right side for the Oompa Loompas and squirrels to enter the room. During the song, the camera faces the front of these doors, where the viewer can see that the doors are cut off 2 feet in, making it impossible for anyone to enter or leave the room through them.
Continuity mistake: After Augustus shows his golden ticket he eats a second bar. His father is behind him, holding sausages at chest level. A shot later his arms are at waist level, without him having had time to lower them.
Continuity mistake: In the beginning, where it is showing how the Wonka chocolate bars are made, we see trays holding twelve pieces of chocolate. When it shows the trays on the conveyor belt, each tray holds fourteen pieces of chocolate.
Continuity mistake: In the scene when Agustus Gloop gets sucked into the chocolate tube, the inside of the tube is covered in chocolate. But in the far away shot, when you see the tube being retracted, it is perfectly clean inside and out.
Answer: We are never shown what happened to him but he may have gone to live with relatives or he was simply put into an orphanage.