Milkyisnotreal
Jett Core X follows Jett, a fast-moving, sharp-tongued speedster from another dimension who uses his incredible reflexes and sense of justice to protect people across worlds. Gifted with an ability of Speed, Jetts faster than anyone alive. Though cocky in battle, his heart is loyal and selfless-especially when it comes to protecting his friends.
When strange attacks erupt across Mania City, Jett uncovers that the culprits are the Croakers, an underground species plotting something dangerous beneath the city. Their leader, King Croaker, commands armies of armored rats and soldiers from deep in the sewers, experimenting with a strange glowing "goo" that could threaten the surface world.
During a rescue mission, Jett saves a kidnapped girl named Marline, but the two are sent tumbling deeper underground, trapped within the Croakers' domain. Meanwhile, his inventive brother Mylo-a genius who can create anything with his power Blueprint Zero-tracks Jett's signal to find and help him. As Mylo dives into the sewers using his rocket boots and gadgets, he begins to uncover the Croakers' secret experiments.
Now hunted by Croaker soldiers and separated from his allies, Jett must fight his way through the darkness below the city while protecting Marline and uncovering what the Croakers are planning. What starts as a rescue mission turns into a race against time that could decide the fate of Mania City.