Heybot!

The Screw Kingdom is a land where humans and VocaBots live in symbiosis, united by the screws they hold dear. Prince Nejiru is given a Screw Soul on his birthday, which leads him to his very own VocaBot, who awakens with a huge fart! Nejiru and his new bot, Heybot, then return to the kingdom to challenge his father to a VocaBattle for the throne!

Driven out of the castle, Nejiru and Heybot head out into town to collect VocaScrews, where they are confronted by the three down-on-their-luck VocaReemans. The VocaReemans want Heybot's Bungle-Bungle Screw to complete their comedy act and escape their hum-drum jobs. Who will win this latest VocaBattle?!

Nejiru and Heybot have just established their new store, the Screw-Ya, and are abruptly visited by wannabe main characters Moeru, Kathleena, and Suchat. They decide to VocaBattle for the title, but Nejiru loses easily due to missing a key screw! Could the mysterious, ghostly Yuko be the key to getting the impact their gags are lacking?!

Heybot buys a mysterious screw seed off a mysterious woman. But although he and Nejiru put a lot of love into raising it, it ends up growing into one flat tree! Enlisting the help of the ninja Naganagamaru and his Stretchy-Stretchy screw, they manage to get the screw to grow... and grow... and it won't stop growing until it reaches the moon!

Heybot's been kidnapped by the VocaReemans! Vocammy, who wants to take Heybot for herself, sends her devoted groupies out to steal him back! When Nejiru also comes after Heybot, they wind up in a three-way battle royal! Who will unlock a special move and earn Heybot's eternal partnership?

Nejiru and Heybot decide to compete in a race for a rare VocaScrew and a lifetime's supply of Imochin! Heybot works with the Zodiac VocaBot Cat Vitiger, while Nejiru works with Vocammy, who is clearly plotting something. Cat Vitiger's overwhelming speed gets Heybot out to an early lead, but he'll have to deal with the missions doled out by the Walls of Voca if he wants to finish the race!

Fuerlu and his friend Gyakuran have come to the Screw-Ya for help. Fuerlu can't stop hiccupping up VocaScrews! Nejiru and Heybot try to help him, but the problem just gets worse and worse. And soon Nejiru's own motives begin to appear a bit suspect...

Heybot and Nejiru awaken to the sounds of samba music, and find the people of the town engaged in a mad dance. Everyone, from the maids to the king, is acting strangely! It turns out it all started when the king's old rival Norio arrived to steal back the Groovy-Groovy Screw. To save his father and all the people of the town, Nejiru and Heybot must venture Groovy-Groovy Island to get it back!

Heybot has grown tired of taking care of the spoiled Nejiru, and, after seeing an ad for a deluxe baby doll on TV, decides to turn himself into a baby. The paternal Zodiac VocaBot Daddyboar shows up to take care of him back at his own home, which inspires jealousy among his youngest baby boar, Inoshiro...

Heybot, whose only form of excrement is farting, has a dream that some day, he might poop. The extinguisher Zodiac VocaBot Togroll is tired of putting out the little fires around him, and longs for a big fire to put out. One day, after the two meet, they are called to save aliens from a vicious monster on Saturn. Will it spell a chance for both of their wishes to come true?

Shortly after Nejiru loses a set of extraterrestrial screws in an online bidding war the VocaReemans, the island quickly becomes overrun by zombies! It turns out GeroReeman was possessed by the Sluggy-Sluggy Screw that they won at auction, and has been transmitting its curse of sluggishness to everyone around him. Can Nejiru and Heybot work together with GuchiReeman to combat this deadly (if ...

Moeru and Kathleena hold a secret meeting with some of the show's more unloved VocaBots about how they can take the protagonist slot from Nejiru and Heybot. The Mojimoji, in a moment's passion, sticks his plug into a picture of Heybot... which causes the real-life Heybot's switch to start swelling!

The reptilian manager Mappiraja appears at the Screw-Ya with VocaBots Dekapurion, Ketsumakka, and Sexy Queen. They want to build a dance institute on Screw Island to show off Sexy Queen's sexy moves, and ask Heybot and Nejiru's help to secure funding. Despite assurances that they'll receive ample compensation, it is quickly revealed that not everything is on the level...

Heybot and Nejiru yearn to go on a journey, which the bad boy rooster Toricky and his boss, the swan Hakusencho, are happy to provide. Together, the trio ends up having their fill of adventure... by getting themselves stranded on a deserted island!

Screw Island is known for being the happiest island in the world. Private detective Muraki Harukaze is sent to find the Screw Island Chronicle and learn the island's secret. But when he arrives, he finds the entire island in the grips of "Cool Japan"!

Nejiru and Heybot have a fight! When Nejiru insists he could easily replace Heybot with another VocaBot just as good, Heybot storms out in tears. Will this be Vocammy's chance to swoop in and break up the pair once and for all?!

Heybot and Nejiru visit a toy store, which is selling everything from Deluxe Heybots to Heybot sofubi dolls to the cheap knockoff "Patchbot." One Heybot Sofubi decides to follow our Heybot home and become his apprentice... but it turns out to be a sinister scheme to replace him in Nejiru's heart!

Nejiru has enrolled in school. This might not seem unusual, except that Heybot is now the teacher for all the classes, as well. Despite suspicion from the students, classes continue, with Heybot constantly awarding Nejiru rare screws for good performance. It's beginning to seem like there's more to their presence than a simple desire for education...

Nejiru and Heybot win a trip to a hot spring in a lottery. On the way, they meet a rock 'n' roll horse named Charabred. Intrigue abounds between the Mini-Mini Inn's proprietress and the tough guy owner of the Manly-Manly Hot Springs Hotel. The only way for the trio to get to the bottom of it is... time travel?!

Heybot and Nejiru arrive at Gekidora Hanten, a lawless restaurant land where VocaBots compete to see who can make the most delicious food. The youngest of the four Gekidora Brothers, Gekiatsu Dragon, claims to be the heir to their father's cooking arts. But can he prove it in a culinary battle for ownership of the restaurant?!

Heybot has been shut away in his room, with the lights out, for a long time now. Worried, Nejiru peeks in... to find Heybot is obsessing over video games! Soon, a screwy mishap results in the video game and real worlds overlapping. Can our heroes set things right with the power of references?

A TV report on a "Mountain of Terror" leads Heybot and Nejiru to Mt. Pandai in search of treasure. But instead of a wealth of screws, they find the Happy Colorful Village, a refuge for rejected character designs. The village leader promises to assign their designs color if they work hard enough, but a sinister plot lurks behind this supposedly "noble" cause!

What starts as a severe stomachache on the part of Nejiru and Heybot quickly escalates, as the sky suddenly darkens and a man called Lord Nejikill descends. Using dastardly tactics, Nejikill steals all the Zodiac screws, as well as Heybot's own screw soul and Bungle-Bungle Screw! When things get this bad, there's only one thing that can save our heroes... a new character debut!

Heybot and Nejiru go to see King Jiru, brimming with questions about Peyket and Chigiru. At the palace, they learn about Nejiru's mother and the secret of Chigiru's birth. Heybot also learns about what makes him Peyket's "brother," and they hold a VocaBattle to test their respective skills!