In the year 2122, a young boy named Ikki doesn't have a Medabot and everybody else does, so he's been saving his money for years going back to the same store, looking at the Medabots. One day the owner of the store tries to sell him an old Medabot, then one day a kid from the screws has his Medabot stolen and his leader goes to see the punks who stole his friend's Medabot and they start picking on Ikki's friend, so Ikki runs and finds a medal in the river and he buys the Medabot and saves his friend. his name is Metabee.

Ikki and Metabee don't get along so well and Henry explains why. Ikki starts to understand why and decides to Ro-Battle the screws. At first, they don't get along and Metabee starts to lose really badly. When Ikki and Metabee start to work as a team, they beat Sammantha and Peppercat.

Ikki's middle school gym teacher makes him and the screws do A LOT (and when I say a lot, I mean a lot) of running but when Ikki and Erika find out the gym teachers big secret, they decide to investigate.

Erika finds out about a ""legendary medafighter"" that supposidly goes to a snoby rich kids private school, so she and Ikki sneek in and go on a search to find him.

The 'Old Man' helps Ikki and Metabee fight on water to to beat the bad bully-meanies.

When no one believes that a UFO landed on her front yard, Erika tries to bring out the truth, while the Rubber Robos make money selling Alien merchandise.

Spyke and Cyandog never seem to win a Ro-Battle so Samantha kicks him them out of the Screws gang. Spyke and Cyandog ask Metabee and Ikki for training help and they find out that Cyandog is terrible at battle because he has the wrong type of medal.

Ikki and Erika decide to do a report on Medabots and Medafighters for school. Metabee finds a Mermaid Medal while strolling. The peeps put the medal into Brass and they find out that this medal was lost when her Medafighter had to move somewhere else, and forgot her medal. Metabee insists on finding Oceana to her Medafighter Hannah. When they find her, they find out that Oceana's body was lost during the move too. Erika, being the great investigator she is, located the guy who found Oceana's body, but he refuses to give it back. Now Metabee has to Ro-Battle Kuraba, a Crab-type Medabot, to win her body back.

Ikki and Erika find out that there are ghosts stealing medals in a forest so they decide to check it out. There they find Karen and Koji who are also looking for the 'Gimmie Ghost' as he is called. What they find aren't ghosts but they find the RubberRobo Gang up to mischief.

It is time for the 10th Annual Medabot Citywide Ro-Battle. Ikki and Metabee want to enter but of course they can't get along and Metabee refuses to listen to Ikki in the Ro-Battles. They both manage to get to the finals anyway but the final test is Koji and Sumilidon. Can Ikki and Metabee get a grip and defeat Koji and Sumilidon. Find out in Part 2.

Metabee and Ikki are still infuriated at each other so Metabee decides NOT to listen to Ikki. Even though Ikki tries to help Metabee, MB tunes him out and loses the Ro-Battle. Koji says that he isn't satisfied with his victory because he didn't give it his all. He also comments on how Sumilidon used Metabee's rage against him. After the defeat, MB's medal pops out of him, leaving it to be stolen by the Rubber Robo Gang. They manipulate Metabee to join the Rubber Robo Gang. Is this over for Ikki and Metabee?

A mysterious Medabot has come to town. This metabot goes by the name Rokusho. Ikki and his pals see him saving a puppy and they realize that he is faster than any Metabot they've ever seen. Metabee finds out that Rokusho is a loner Medabot with his past shrouded in mystery. Meanwhile, the Rubber Robo Gang is off making mischief and when Ikki's house gets attacked, Rokusho helps Metabee fight them off. While the day is saved, who is Rokusho, and where is he from?

Samantha has a hard choice to make. Give up Ro-Battling, so she could stay with her "true love" (who doesn't like Medabots) or forget about him and continue as a Medafighter. She decides to quit Ro-Batting for Nathan, who doesn't like Medafighter because he lost to Samantha years back. Now, Samantha has an even harder decision. Will she lose purposefully to regain her true love's spirit back?

When Ikki wins two free tickets to popular Ninja Park, Erika persuades him to take her as his free guest. Ikki's first choice was Karin, but Erika wants to do a story on the park. Ikki reluctantly agrees because Erika took one ticket and wouldn't give it back. The main attractions to the park are the Explosive Ninja Show that features Ninja-Type Medabot Nin-Ninja and Kunoichi (Female Ninja)-Type Medabot Icknite, as well as the Ninja Castle that says closed for renovations. Disappointed, Ikki and Erika proceed to the Ninja Show. As the Ninja Show begins, Ikki and Erika notice that the monsters in the show look very much like the Rubberobo Gang. Seaslug has decided to hold Ikki and Erika captive until renovations are completed on their new base Ninja Castle! The Rubberobo Gang has stolen the Medals of Nin-Ninja and Icknite, and has complete control over them. Intuitively knowing that Ikki and Erika are in trouble, Metabee and Sailor-Multi (nicknamed Brass) come to their rescue.

While traveling across the nation, training to become the best in the country, a Medafighter stops at Ikki's home. He is looking for a blue and white Medabot that interrupted his training in the mountains. The Medafighter tells Ikki that over 100 Medabots attacked him at one time and defeated his Kintaro-Type Medabot Kintaro. He can't remember seeing an Medafighter, and only remembers a white and blue Medabot with horns. A blue and white Medabot with no Medafighter? That description fits Rokusho, but he can't possibly be the one that did this terrible thing, can he? When Rokusho is confronted, the truth is revealed - it was indeed Rokusho who interrupted their training, but for good reason. Acting alone, Rokusho did this because they were cutting down trees during their training. He stopped their training not with force but with compassion. This sounds more like the Rokusho that we know!

Spring is in the air, and like flowers, the hearts of men are blooming for Miss Mimosa, a popular teacher at Ikki's school. Coach Mountain, Squidguts, and the local florist, Mr. Richards all want to confess their love for Miss Mimosa but are too shy. Not surprisingly, Mr. Richards tries to express his feelings with flowers. But now someone is stalking Miss Mimosa by making crank telephone calls, following her home and breaking into her classroom. They discover that Mr. Richards' Medabot Flower-Type Medabot FLORO is the culprit. He tried to act as a go-between by calling her at home and visiting the school, all in an attempt to bring Mr. Richards and Miss Mimosa together. Then, just like his Medafighter, FLORO became shy and nervous when he approached her.

Ikki is accused of being the Phantom Renegade by a reporter so the reporter follows him everywhere and even starts mimicking the Phantom, hoping Ikki would reveal his secret. But then the real Phantom (not Ikki or the reporter) comes out into the opening seeking revenge.

Angry moms that don't like Medabots steal their kids' Medabots and pack them away. Ikki and Metabee talk some sense to the mean mothers and they get a grip and everyone lives happily ever after. For now, anyway.

Penguins are cute with their black and white bodies and small wings, and the unique way they waddle when they walk. When they stare at you with those beady eyes, it just takes your breath away! Along with a little boy named Paco and his Medabot Pingen, Ikki and his friends break into a strange animal park operated by the Rubberobo Gang to help send hundreds of penguins back to their home in Antarctica. Pingen, a Penguin Type Medabot that is not suited for battle because of its weak armor, was a present from Paco's dad in Antarctica to keep Paco company while he is away. Rubberobo's plan was to build a zoo to raise funds for taking over the world! The mistake was trying to make a zoo with only penguins. Their bizarre plans were spoiled when Pingen, Paco and his new friends succeed in setting the penguins free. Ikki and the others are happy to help send the penguins home to Antarctica, but hate to say goodbye to Pingen.

The Rubber Robo Gang comes up with a plan to use Ikki and Metabee to steal a super rare medal from Dr. Aki himself, who is the creator of all Medabots and also Karin's uncle.

The Rubber Robo gang tries to steal a rare medal from the Medabot Corporation, who is the worlds supplier to 90% of Metabots. Inside, the RRG steals Belzega, a medabot that has one-hit-beats-him attack. Ikki and Metabee try to stop him and when Metabee was too tired, Brass and Nutranurse helped out. In the end, Dr. Aki realizes that the RRG wants ALL the rare medals of the world so he appoints the Phantom Renegade to protect them.

Ikki and Metabee are being trained by Dr. Aki to become top-level, highly skilled fighters for Robattle. The doctor visits a friend of his, Kailey, the famous stunt pilot. Kailey and her Plane-Type Medabot Femjet are practicing their aerodynamic moves when Femjet is unable to pull out of a dive and crashes into the forest. Kailey explains that three months ago at the City Airshow, she made a mistake on her landing and Femjet crashed badly. Ever since that crash, Femjet has been afraid of flying. Ikki suggests that Metabee and Femjet train together so Metabee can learn flying battle techniques while Femjet regains her confidence and aero-form. Kailey flat out rejects Ikki's offer. Feeling slighted, he challenges her to a Robattle. She agrees, and Mr. Referee officially declares the start of the match. Unfortunately, Metabee has only homemade aero-parts to use, and is unable to move. He ultimately defeats himself with his own missiles!

Rokusho meets Ainsley, a woman that lost her husband in a war, and they start to become friends. When Rokusho sleeps on Ainsely's tree, he remembers something about his past with Dr. Hushi. The tree reminds Ainsley about her husband. The tree is important to both of them so they both try to protect it. The Rubber Robo Gang think that there are rare medals buried by the tree so they get into a ro-battle and set the tree on fire. While, both Rokusho and Ainsley are saddened, Ainsley says that they don't need the tree anymore.

Karin is having a costume party and invited everyone, from Ikki, Erika, and Metabee (who are real glad to be invited) to Samantha and the rest of the Screws (who were surprised to get an invite). Koji got and invite to and he decides to confess his love to Karin at her party. Just as he's about to confess his love, the rubber Robo Gang crashes the party and with all the confusion, Koji confesses his love to Samatha, by accident. But she thinks he's really telling the truth.

Rokusho finds out that Dr. Aki was the one that set fire to Dr. Hushi's house and Rokusho gets VERY angry. Metabee tries to protect Dr. Aki and has to Ro-Battle Rokusho. When Metabee is about to win, Rokusho uses the 'Medaforce' (which is a medal's maximum power) to pummel Metabee into oblivion. Metabee is beaten so badly that his medal comes out. Just when things can't get any worse, Dr. Meda-Evil releases a REALLY BAD and strong medabot to Ro-Battle Rokusho and take his rare medal. Will Rokusho win the Ro-Battle with Dr. Meda-Evil? Will Ikki & Metabee ever win a Ro-Battle again? Find out in Part 2.