Enter Rintaro

While practicing with his new Medabot Krosserdog (Cyandog's medal in a new body), Spyke encounters a mysterious, powerful-looking Medabot. Moments later, he and Krosserdog are hit by a tremendous energy blast.

Ikki tells Dr. Aki about an encounter that he had with four never-before-seen Medabots. They struck Metabee when he was at his weakest: immediately after he exhausted his energy by using the Medaforce. Ikki is convinced that these new Medabots are after Metabee's rare medal.

Ikki, Metabee and Erika discover Spyke, still stunned from the forceful blast. Samantha arrives, and she accuses Metabee of beating up her precious Peppercat. Apparently, Metabee has been identified as the culprit in several attacks on Medabots around town.

Ikki and Metabee flee in a panic, only to be chased by an angry mob of defeated Medafighters. They manage to escape again, but they're troubled by the wrongful accusations. They conclude that, perhaps, Metabee has been cloned, and his double is the one wreaking havoc.

Meanwhile, Koji is distressed about his robattle ranking. Since he was declared number two Medafighter in Japan, no one wants to robattle him! Koji goes to the market, where he encounters a boy named Rintaro and his new KBT-type Medabot, Kantaroth. Kantaroth is a dead ringer for Metabee! Kantaroth and Sumilidon robattle hard until Kantaroth misfires and topples a large sign onto Mr. Referee, knocking him out. By this time, Ikki and Metabee have arrived on the scene, and they realize that it was Rintaro and Kantaroth who were to blame for the rash of Medabot attacks.

Later, Rintaro explains to the kids that he's come from a neighboring town to robattle Ikki. He admires Ikki for climbing the robattle ladder so quickly. Plus, Metabee is the same Medabot type as Rintaro's hero, the Phantom Medafighter. Rintaro tells Ikki about the mysterious Phantom Medafighter, a young upstart from Japan who shook up the World Robattle Tournament eight years ago with his KBT-type Medabot.

When Rintaro seems to be getting sweet with Karin, Ikki and Koji challenge him to a robattle. But the match is interrupted by Shrimplips and the Rubberobo Gang. Shrimplips has arrived with Gokudo, one of the mysterious four Medabots whom Ikki encountered earlier. Shrimplips challenges all three of the boys to a robattle, but there's a catch: this time, they're playing not for Medaparts, but for medals!

Meanwhile, Spyke has recovered from the shock of the blast. He tells Samantha that he was not attacked by the mysterious Medabot, or by Metabee. In fact, he and Krosserdog were hit by lightning.

To prove his fair sportsmanship to Ikki, Shrimplips casts off his Rubberobo identity, and he robattles under his real name: Shrimpy Lipowitz. Ikki, Koji and Rintaro are unable to put their egos aside and robattle as a team. One by one, their Medabots are picked off by Gokudo, and by his Rubberobo teammates Hakado and Sir Gold. At last, Metabee is also defeated. Shrimpy claims Metabee's rare medal as his prize. But just then, the mysterious Medabot whom Spyke saw earlier appears. Who is this Medabot? And what does he want?

Ikki Tenrio, Mr. Referee, Samantha, Metabee