Mystic Mansion

thumb|176px|right|Mystic Mansion BGMMystic Mansion is a medium-easy level and the twelfth level in Sonic Heroes. This level is before Robot Storm and after Hang Castle. It takes place in a haunted castle and is the second level in the 'Haunted' theme.

After managing to get inside of the fortress Hang Castle takes place on the outside of, the Teams face even more strangeness. Hallways go in infinite circles before straightening out, skeletons with mischievous smiles on their faces hide behind doors that go nowhere, paintings come to life as robots emerge from the walls, and huge spiderwebs hang above bottomless pits that lead to oblivion. There's even a well in the mansion's center that opens up into a distorted, multicolored dimension filled with pumpkin-headed ghosts. When the level is beaten by Team Dark or Team Sonic, players will find themselves standing in a giant reservoir on top of Hang Castle, where there are no more ghosts, and it is calm.

Mystic Mansion, much like Hang Castle, is filled with booby traps, such as the pumpkin-headed ghosts that appear, or the trolleys. There is also a special Egg-Robo that only appears in this stage called the E-1009 Egg Bishop. These red clad robots wear wizard caps and carry around a scepter. Instead of attacking, they can preform incantations or spells of some kind that heal their robot comrades when the player damages them. This robot also has a unique Jekyll and Hyde type design with two personalities, as they can flip over and transform into their alter ego, the E-1010 Egg Magician. This sinister blue robot can put a curse on the ground to create a vacuum that sucks rings from anyone unlucky enough to run into it. It will not flip faces of its own accord, but only if the player forces it do so by creating a tornado in Speed Formation.

Trivia

 * Lasers and rip lines will occasionally block the player's path in this level, but if Espio is invisible, he can slip through them.
 * This is the only level where all teams start at the exact same point.
 * In the very first room, there is a picture of the whale-shaped island from Seaside Hill.
 * The ring hallways can only be accessed by Team Dark, Team Chaotix and Team Sonic (Super Hard mode).
 * Teams can go outside of mystic mansion only if they have action replay or any cheating device including a memory editor.
 * Switches that trigger may teleport teams to different areas in the castle.