Union Grand Prix. An interdimensional game where many young men and women are chosen to participate in a series of games where they transform into masked warriors known as Kamen Riders, fight against the monsters known as the Jyamato, and compete ag...
The Jyamatos are plant-like monsters who devour worlds through their evolution. They serve as the main enemies of the Union Grand Prix.
The Jyamato have existed for many years, but are not known to the general public due to the UGP erasing the memories of them from all those unaffiliated with the organization. The Jyamato are created and grown inside the Jyamar Garden from tree-like plants, who feeds on the bodies of deceased Union student/professor or villains, which causes them to evolve much more rapidly than other forms of life.
Their overarching societal structure and motivations for attacking humans are currently unknown, but their basic behavior and physiology seems to change with each incursion into civilization, centering on a specific schema that the UGP uses to organize different games.
There are currently five known categories of Jyamato; Pawns are the weakest and function as foot soldiers. Rooks are much stronger than pawns and are capable of defeating armed Riders on their own. Bishops are currently seen to take on human appearances as a disguise, Knights are among the strongest class of Jyamato, and according to information from the UGP, can potentially become powerful enough to destroy the entire world, while the non-humanoid Fortresses are naturally giant than normal-sized Jyamato, and often appear in the final round.
While their intellectual capacity is unknown, they are able to speak their own language. Their evolution from being fed upon the deceased Union members and villains seems to be much more drastic in terms of their offensive capabilities.
Known Jyamatos
Pawn Jyamatos - Weeds (not the drug kind)
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Rook Jyamato - Pitcher plant
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Bishop Jyamato - Mushrooms/Fungus
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