Ep 19. Under the Microscope

Tyson is overconfident after his previous win and challenges Kai, the former Beyblade champion. Meanwhile, Kenny and Hilary discover that some of the parts in Tyson's Beyblade were counterfeit. After Tyson's Beyblade breaks during a practice battle, Kenny takes it apart to examine the damage. He discovers that some of the parts are not genuine, which explains why Tyson had difficulty controlling his Beyblade during the previous match. After further investigation, Kenny and Hilary discover that a man named Crusher may be responsible for the counterfeit parts. They find out that Crusher operates a factory where he produces the fake Beyblade parts.

Tyson, Rei, and Max decide to check out the factory in person, but they get there too late. Crusher has already left, and they are attacked by his henchmen. They manage to escape but are unable to locate Crusher. Eventually, they are led to a scientist named Dr. Zagart, who appears to be working on a new type of Beyblade. Tyson is initially excited but becomes suspicious when he learns that Dr. Zagart has been conducting experiments on living creatures and even tried to create a Beyblade that was powered by a human's life force.

Tyson refuses to work with Dr. Zagart, and the scientist becomes angry and turns on him. The two engage in a battle, but Tyson quickly realizes that Dr. Zagart has created a new type of Beyblade that is incredibly powerful. Tyson struggles to keep up until he uses his knowledge of physics to figure out how to defeat the new Beyblade. Meanwhile, Hilary, Kenny, Max, and Rei work to track down Crusher and find out the truth about the counterfeit parts.

In the end, Tyson defeats Dr. Zagart and his Beyblade can no longer be considered the strongest in the world. However, they are still left with the mystery of who is behind the counterfeit Beyblade parts. The episode ends with the team determined to discover the truth and put a stop to whoever is trying to manipulate the world of Beyblade.