Mario, Luigi, Toad, Sonic and Tails in the purple Phantasmal Fog at the British Museum.

ThePhantasmal Fog (also referred to simply asfog) is a type of colored fog produced by thefog urn that appears in theNintendo 3DS version ofMario & Sonic at the London 2012 Olympic Games. In the game's Story Mode,Bowser andDr. Eggman attempt to use the fog to prevent the Olympic Games from happening after not receiving invitations. The fog comes in seven different distinct colors plus a rainbow colored variant, and is spread usingfog machines and the fog amplifying system.

The Phantasmal Fog was originally located alongside the fog urn at an ancient ruin site, where its ability to produceimposters was used as a curse to deter looters, though was stolen around 300 years before the events of the game by the pirateWilliam Kidd who used a magical seal to keep the fog within the urn and remove it from the ruins. When Dr. Eggman got hold of the urn, he designed the fog amplifying system to allow him to partially open the seal and release the Phantasmal Fog, but later got Bowser to haveMagikoopa fully break the seal to allow the fog's power to be fully utilised. He then hadOmega transport the urn back to him after the fog was released, and then proceeded with his plan to use it to stop the Olympic Games.

In the story mode, the fog first appears inThe Night Before, where Bowser and Dr. Eggman first use the fog amplifying system andfog machines to produce blue fog at the Olympic Stadium. The fog scares off the characters setting up for the opening ceremony and creates the first imposters.Mario andLuigi investigate the fog alongsideToad andOmochao inStadium Blues, finding out that the fog lifts when imposters are defeated, and manage to clear it from the stadium by breaking the fog machine inFoggy Foes, as well as finding out that it is something to do with Bowser. At the end of the episode, they notice that pink fog has appeared over Hyde Park and head there to investigate.

Daisy andAmy come across the fog and a group of imposters inMorning in Hyde Park, andPeach,Blaze and a group ofToads also encounter the same thing, and follow the purple Toad's lead about seeing a bat around to find the cause. InThe Mysterious Thief, they encounterRouge who initially tries to trap the group in the fog, though after being defeated in an event is discovered to have been brainwashed by the fog. She leads them to a fog machine, which they break to clear the fog from the park. It is revealed that Dr. Eggman has something to do with it at the British Museum when Mario, Luigi and Toad arrive.

InSonic Arrives, red fog appears at the Tower of London along with a pair of imposters, which Sonic and Tails defeat and also find out that the fog thins when they disappear, and inThe Ghostly Tower, the pair destroy the fog machine and clear up the fog, concluding that Bowser is responsible asBoo andKing Boo were guarding the machine. Orange fog appears around Tower Bridge and prevents it from being lowered inThe Blocked Bridge, and afterYoshi defeats a pair of imposters, Sonic and Tails share their conclusions with Yoshi, Shadow and Silver and search for the fog machine. The machine is found withJet's help being guarded byBowser Jr. inThe Wind Master, and after Bowser Jr. is defeated inEnter Bowser?!, the machine is destroyed and the fog is cleared, and Bowser Jr. accidentally reveals that Dr. Eggman is also partially responsible for the fog. Jet mentions that there is still fog elsewhere in the city, and Sonic and Tails head to the British Museum to investigate it there.

Mario, Luigi, Toad, Sonic and Tails encounter purple fog at the British Museum inMario and Sonic and find out that they have all made similar conclusions about it, and clear it away by destroying a fog machine inThe Secret of the Fog, while Tails manages to find out some of the history behind it.Wario encounters yellow fog at Eton Dorney inWario's Scheme, and attempts to clear it up by trying to destroy the fog machine, which is revealed to be a 3D hologram. Wario later manages to clear up the fog withWaluigi's help by destroying the real fog machine inStop Dr. Eggman!. Sonic,Knuckles andVector find green fog at Horse Guards Parade, and clear the area by destroying the fog machine there.

InClear Skies Again, the groups reunite in the Main Stadium and reveal that they have managed to clear the Phantasmal Fog from all of the sites across London, and therefore the Olympic Games can now be held. Bowser and Dr. Eggman find out that the fog has been cleared, and Dr. Eggman decides to cover London in fog again by using the fog amplifying system's newly added turbo button. The Phantasmal Fog turns out to be more powerful than Dr. Eggman first thought and breaks the machine, causing more powerful rainbow-colored fog to cover and London and power up Bowser and Dr. Eggman. The group at the stadium find that the fog has returned without fog machines inA Rainbow In Fog, though note that it is different and now produces more powerful imposters. Omochao notes that they will now have to clear the fog simply by defeating the imposters that it produced.

InTo the Ruins!, it is found that the fog has spread as far as Stonehenge, and after more of Omega's memory banks are restored, he reveals more of the urn's history based on what Dr. Eggman had sent him to at Stonehenge. On their way back to Big Ben to confront Bowser and Dr. Eggman inThe Promise to Toad, Toad and Omega have to leave the group as the prolonged exposure to the fog is causing Toad to struggle to breathe and damage to Omega's circuitry.

Mario, Luigi, Sonic and Tails confront Bowser and Dr. Eggman, who have both been powered up by the fog, inThe Grand Showdown, and find out that the other characters have managed to clear the rest of the fog from London. After Bowser and Dr. Eggman are defeated, Mario uses the urn to clear up all of the fog and Sonic reseals it using its lid, causing Bowser and Dr. Eggman to lose their enhanced power in the process. Grey fog appears inside Big Ben inThe Fog Returns when Dr. Eggman partially unseals the urn, before explaining the history of the fog toOrbot & Cubot andMetal Sonic.

The Phantasmal Fog has many traits associated with it, most notably the ability to create imposters that take the form of the person that the one holding the urn is thinking of. However, the fog is weakened when the imposters are defeated, though is thickest around the imposters. The fog also appears to have the ability to brainwash those who breathe it in and temporarily wipe their memory, and also to allow those who breathe it in to alter their voice. The denser rainbow-colored fog comes with several additional traits of creating stronger imposters, powering up those who breathe it in, and also causing breathing difficulties with prolonged exposure. While robots are immune to most of these effects, circuitry damage can be cause by spending longer amounts of time in the rainbow-colored fog.

Gallery[edit]

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  Blue fog inStadium Blues

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  Red fog inThe Ghostly Tower

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  Pink fog inMorning in Hyde Park

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  Orange fog inThe Blocked Bridge

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  Yellow fog inStop Dr. Eggman!

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  Green fog inCorner the Koopa King!

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  Rainbow colored fog inA Rainbow In Fog

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  Grey fog inThe Fog Returns

Names in other languages[edit]

• Mario & Sonic at the London 2012 Olympic Games

• Articles with unsourced foreign names