Sonic: Night of the Werehog (ソニック＆チップ 恐怖の館,Sonikku to Chippu Kyōfu no Kan?, lit. "Sonic & Chip: House of Horror") is a 3D animated comedy-based dialogue-less short by Sega based on and taking place within the events of Sonic Unleashed. In the short, Sonic and Chip enter a classic haunted house that is haunted by three ghosts, two ofwhom are trying to win the affection of a third, Lah, by photographing the expressions of people they've scared. However, the ghosts didn't expect the brave Sonic to be a Werehog. It was originally released on 17 November 2008, with a Japanese dub that only replaced Sonic and Chip's voices and the ending picture aired the following month.
The short opens with two boys entering a haunted house during a rain storm. As they explore the house, they are watched by Su and Uh. The two ghosts scare the children out and take pictures of their frightened faces. Once they take their photos, they return to Lah and present her their photos to impress her. Ultimately, Lah chooses Uh's picture and rewards him with a kiss, leaving Su defeated.
This time, Sonic and Chip enter the house. Sonic is interested but Chip is rather frightened. Su scared Chip when he passes by a mirror with a freaky reflection of himself. The photo of Chip impresses Lah, thereafter the ghosts continue to scare Chip to win her heart. Even Sonic accidentally makes a scary face at Chip which causes him to faint. The pile of pictures of a frightened Chip grows with each scare. However, Lah is dismayed to see several photos of Sonic that showed him unaffected by their scares, holding a book, yawning, and making a silly face at the camera.
The male ghosts hunt Sonic and Chip disguised in armor. As Chip cowers in fear, Sonic transforms into his Werehog form upon seeing the full moon and scares the two ghosts, causing their cameras to take photos of themselves. Lah laughs at the photos of the frightened ghosts. Humiliated, annoyed and angered, both ghosts decide to team up to form a giant ghost named Baker to attack Sonic.
While Sonic uses his abilities as a Werehog, Baker gains the upper hand since it can become invisible and invulnerable as such. As the two fight, Chip discovers that Sonic can see Baker by taking its photo. While trying to exploit this fault, the ghost uppercuts Sonic high into the air as he waited for the photo to develop. As he free-fell, Sonic took multiple photos of the ground to expose Baker, only to be attacked again as he tried to make the photos develop faster. After the photos finish, they reveal Baker mockingly posing the same ways Sonic was when Su and Uh took photos of him.
Infuriated, Sonic began recklessly attacking his surroundings, only to take a full charge from Baker and crashes into the wall. As Sonic lay unconscious on the ground, Baker proceeded to take his photo. Su and Uh began to fight over the camera, as they both want to impress Lah, causing Baker to separate. As they fight over the camera, Sonic reawakens and scares them. Sonic then swings them around before tossing them high above and finishing with a powerful punch that sends the ghosts flying to the moon. Right before he punched, the camera went off just before Sonic sent the final blow. Lah found the taken photo of Sonic as the Werehog and falls in love with him.
In the morning, Lah impersonates Chip and has Sonic take a picture with her. However, when the photo comes out, Lah's true form takes Chip's place. After the credits, Su and Uh are seen depressingly looking at Lah and Sonic move farther away. They turn around to see the real Chip, who has been kidnapped so Lah can look like him, struggling to be freed.
This marks the first time Sonic is shown taking pictures with a camera.
In Sonic Unleashed (Xbox 360/PlayStation 3) the two ghost photographers Uh and Su have also appeared in Spagonia and Adabat on the missions "Tower Terror" and "Fright Fight".
During the premiere, Comcast cable systems showed Night of the Werehog in its Video On Demand Service.
When Sonic and Chip are walking down a hallway, there is a portrait of Uh on the left wall.
The first pictures Su and Uh take of Sonic depict looking surprised in the background, reading a book, yawning, and making a silly face. Later, when the two ghosts combine they mockingly pose the same way Sonic did, causing him to lose his temper and attack wildly.
A Dreamcast can be spotted three times in the video.
Sega's Joypolis theme park had showings of Night of the Werehog in 3D.
The short has only 5 short lines of dialogue. They are when Sonic says "Whoa" when entering the house; "Oops" when he scares Chip, causing him to faint; when Chip says "Aha" after figuring out a way to see the powerful ghost; a "Hey" when Chip throws Sonic the Werehog the camera; and "Yay" when Sonic and Chip celebrate.
During the beginning of the fight scene, there are three pictures on the wall over the fireplace that seem to feature Uh, Lah and Su as humans.
On the female ghost's mural there's a poster of the 1941 movie, The Wolf Man. On the poster, the Wolf Man looks much like Sonic's Werehog form except that the werewolf's claws were black and he doesn't have Sonic's quills. Also on the mural (if one looks carefully) is a poster of the 1932 movie, The Mummy.
On the board where the pictures of scared children are posted, underneath there is a decorative plate with the ghost girl on it, but it appears that the picture is from when the ghost girl was still alive. She also has a white cat next to her.
There was originally going to be a scene that would feature Sonic and Chip playing the Dreamcast.
Su's and Uh's photos have a bow tie and a bandanna insignia on the bottom right corner respectively.
Sonic's lack of manners is seen here as the hedgehog doesn't bother wiping the mud off his shoes before entering the house.
However, after the scene which shows Sonic and Chip looking up at the skylight, Sonic's mudprints on the floor disappear.
The camera being able to take pictures of the ghosts while they were invisible might be a reference to how the camera used in Sonic Unleashed can expose Dark Gaia's minions during an exorcism.
There is an error in one scene, as Uh is the right half of Baker when the Werehog throws it up in the air but is the left half when he accidentally takes a photo of Sonic.
Sonic's transformation into the Werehog differs slightly from the video game. Sonic transforms when he sees the full moon in this short, as opposed to transforming at sunset in the game.
This is a reference to the mythical legend of lycanthropy, which influenced the Werehog's creation.