Other mistake: When the Seven headed Mouse King is confronting Marie the second time, asking for her dresses and books, he is sitting on the ledge talking to her with his forward most head. As he is talking with the head to the left, the eye on the head to the right does weird things. The iris rapidly expands and contracts in size a few times taking up the white space in the eye under the iris a few times before returning to normal for that head to talk.
Other mistake: When in the Swan boat, Marie has her arm hanging out with her fingers dragging the water, making waves. She is lying down and back in the boat, with a wing obstructing her view. Yet somehow the reflections of the waves show her face, perpendicular to the boat. Not parallel like her face actually is to the boat, and also somehow reflecting her face despite both a swan wing being in the way, and her being down in the boat out of view of those waves.
Other mistake: When the Mouse Queen is standing on the baby princess' crib, the baby's head is towards the wall with the hole which the Mouse Queen came out of. The Mouse Queen is standing at the baby's feet, with her back towards the nursemaids. Yet after she casts the spell on the princess, she leaps straight backwards in a back flip and somehow lands right next to the mouse hole. For that to have worked, she would have to have jumped over the baby's head the opposite direction.
Other mistake: After Marie and Fritz take off to the Christmas tree in the first scene where they talk to their parents, Fritz is shown pulling toy soldiers off the tree to play with. In the first shot of the tree, Fritz stands back up from the toys he has already taken down and reaches for another one. There is nothing in his hands. The spot he reaches for has nothing in it, but as soon as his hands reach that part, a toy soldier suddenly appears in the spot he touches, without the camera cutting. And then in the next shot he bends down and puts his hands on his toys as if he is placing the toy soldier with the rest, but there is again nothing in his hands.
Answer: The original 1816 story "The Nutcracker and the Mouse King" by ETA Hoffmann features the seven-headed Mouse King. Since then there have been numerous adaptations and re-imaginings of that story in literature, on stage and screen in different forms. In the classic versions the Mouse King has seven heads wearing seven crowns, other versions he has only one head, and in a few versions three heads. In the original and other adaptations the number seven is specified several times: Marie Stahlbaum is seven yrs old; the seven-headed Mouse King; the seven steps backwards; seven little crowns. The makers of this animated movie chose to feature the classic Mouse King.
Super Grover ★