A yellow Fog machine.

Fog machines (also referred to asPhantasmal Fog machines and simplymachines) are devices created byDr. Eggman used to spread thePhantasmal Fog at various sites around London in the Story Mode of theNintendo 3DS version ofMario & Sonic at the London 2012 Olympic Games. The machines each produce a different color of fog, and can be shut down by destroying the dome on the top. The machines have a similar design to Dr. Eggman's other inventions, particularlyEgg Pawns, with four fans on each of the legs to distribute the fog and a large glass dome on the top which produces it.

Dr. Eggman first mentions the machines inThe Night Before, where he asksBowser to send some of his minions to guard the machines. A machine producing the blue fog at the Main Stadium appears inFoggy Foes, where it is being protected byDry Bones andDry Bowser.Mario andLuigi destroy this fog machine by eachGround Pounding on the dome, clearing up the fog and coming to the conclusion that Bowser's minions are responsible for it.

After regaining her memory inThe Mysterious Thief,Rouge leadsPeach,Daisy,Amy,Blaze and the yellow, blue and purpleToads to another fog machine producing the pink fog in Hyde Park, which Blaze destroys. AfterMario,Luigi andToad arrive and ask her about Bowser's connection to the machine, Rouge remembers that it is the work of Dr. Eggman.

King Boo and aBoo appear guarding a fog machine producing red fog inThe Ghostly Tower, whichSonic destroys using a spin dash.Tails was initially disappointed by this as he wanted to see how the machine worked, though notes that the machine's destruction has caused the fog to disappear. After discovering the orange fog on Tower Bridge inThe Blocked Bridge, Tails suggests they try to find a fog machine in the area.

After running intoJet inThe Wind Master,Yoshi, Sonic, Tails,Shadow andSilver believe he may have caused the fog, though after finding out he has not, they ask him to help. Though he initially refuses, he agrees after Shadow defeats him, and then reveals that he has already found the machine. He tries to destroy the machine but fails, andBowser Jr. appears to protect it. After Bowser Jr. is defeated inEnter Bowser?!, Shadow destroys the fog machine and Bowser Jr. accidentally reveals that it is Bowser and Dr. Eggman's work.

Mario, Luigi, Toad, Sonic, and Tails findEggman Nega guarding the fog machine making purple fog at the British Museum inThe Secret of the Fog, and though he initially promises to show them the location of the machine if they defeat him, he breaks his promise when he is defeated. The group track down the machine regardless and Mario and Sonic break it with another Ground Pound and Spin Dash.

Wario finds a fog machine making yellow fog being protected by Dr. Eggman inWario's Scheme, and after defeating Dr. Eggman tries to destroy it, though Dr. Eggman reveals that he had replaced the real machine with a 3D hologram. Wario andWaluigi track down Dr. Eggman andMetal Sonic inStop Dr. Eggman!, and after defeating them in an Olympic Event and causing a diversion, Wario destroys the fog machine that they were protecting. Another fog machine producing green fog is found by Sonic inCorner the Koopa King!, where it is being protected by Bowser, though after he is defeatedVector keeps him away whileKnuckles destroys the machine.

Dr. Eggman acknowledges the destruction of the machines in Clear Skies Again, though replaces them using the full power of the fog amplifying system. Toad also mentions the lack of fog machines inA Rainbow In Fog.

A fog machine appears as the image on the Story Mode 2 badge.

Names in other languages[edit]

• Mario & Sonic at the London 2012 Olympic Games

• Articles with unsourced foreign names