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The Symmetrical-Docked form of HyoRyu and EnRyu, formed when their SympaRate, a measure of their synchronization and unity of purpose, reaches 100%. ChoRyuJin is a defensive specialist with his Mirror Coating Chestplate (which he uses at the risk of his life) and ability to use the Eraser Head tool. He also possesses HyoRyu and EnRyu's Gun, Rifle, and Tonfa attacks, usually used in "Double" form firing from both sides at once. He can also fire both guns and both rifles at once for a full-burst-style attack. After the initial Primeval attack, ChoRyuJin is retrofitted with the ability to fire Ul-Tech beams in place of heat or cold, which appear similar to most beam weapons in anime.

In technical specifications (and finally shown in King of Braves GaoGaiGar FINAL), he also has the desperate final attack Super Nova - in which HyoRyu and EnRyu turn their respective dials to "Infinite" and simultaneously blast the enemy with their Chest attacks. Due to the placement of the chest plates on ChoRyuJin, he could not in fact use this attack while Symmetrical-Docked.