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The Tanden Engine (丹田エンジン Tanden Enjin?) is a powerful device developed by S.I.N. to be used in the spare bodies of M. Bison. Seth was intended to be a body like that and as such, he utilized the Tanden Engine.


The machine takes the form of a large sphere adorned with the yin-yang design. It is located in the abdomen of these "puppets" and grants them a remarkable amount of power. It appears to harness both positive and negative energy, as evidenced by the colored energy that emanates from Seth's hands when he uses it. Its main purpose is to assimilate the moves of defeated fighters.
Tanden Engine

Seth uses the Tanden Engine to assimilate his defeated opponent's data.

As the power source, the Tanden Engine also serves as the puppets' greatest weakness. In Juri's ending in Super Street Fighter IV, she destroys Seth's Engine by stomping on it, severely weakening him and leaving him to die.

Seth created a miniaturized version of the Tanden Engine, called the Feng Shui Engine, to serve as a replacement for Juri Han's left eye. 


The Tanden Engine copies and translates the data from other fighters, which allows Seth to mimic the special techniques of other fighters, such as the Shoryuken, the Sonic Boom, the Lightning Kicks and Dhalsim's unique ability to stretch his limbs. In addition, it also allows the user to generate miniature black holes. These are designed to draw the opponent closer. When performing this technique, Seth's skin color turns black, and his eyes turn black with a yellow iris.

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