During the Credits
Drawings of Juliet and the other main characters from the game are shown running past a constant revolving background with locations from the game during the credits of Lollipop Chainsaw.
After the Credits
There are two different comic book-style endings after the credits that can be shown depending on how many students your safe or let die. Check out massive spoilers and more details regarding both alternate endings below.
If you save enough students, then the same extra scene after the credits if shown with Juliet and her friends returning to her house. This time, however, once Juliet introduces Nick, her mom turns around to reveal a birthday cake that she’s been baking for Juliet. Everyone then sits down to eat cake and Nick gives Juliet a box containing roses as a present. The word “Fin” is again shown as the scene fades to black.
After either of the two endings there are popup notifications letting the player know that various new modes and items have been unlocked. Beating the game by saving enough students and getting the true/good ending also rewards the player with the “Congratulations! Happy Birthday!” achievement or trophy.