Brady and Boomer are just two ordinary twins. Or, so they thought. They soon learn that their parents were king and queen of a small island and they are next in line to rule. But, their distant cousin is planning to stop them from being kings.

The twins must save their island from an erupting volcano that they awakened. To do this they must cross into the dark side of the island and find a replacement rudy which is a task impossible to do. Lanny tells the villagers that Brady and Boomer are dead so he can become the next king.

The twins must save thier island from an errupting Volcano that they awakened. To do this they must cross into the dark side of the island and find a replacement rudy which is a task imposible to do. Lanny tells the villagers that Brady and Boomer are dead so he can become the next king.

While Mason is out of town, the twins hang out with a bunch of mermaids and Mikayla turns into one herself.

Brady and Boomer find a cute creature in the jungle and decide to keep it as a pet.

Brady and Boomer find a cute creature in the jungle and decide to keep it as a pet. But, it isn't cute for long

Brady gets jealous when Mikayla introduces her friend, a boy named Tristan. To impress her and make sure Tristan does not win her over, he gets Boomer to go to school with him and he tries to do everything he can to keep Mikayla and Tristan apart.

Boomer and Brady meet an odd creature in the woods named Ogie (Doug Brochu). But Brady is jelous of the Ogie and is mean to him. Brady fills a void by being Lanny's friend, but Lanny's plot is to kill him. But when Boomer is invited to a feast, he isn't going to a dinner; he is dinner—or so it seems.

The boys learn about Junga Ball, a dangerous game much like basketball. when they are told they will be team captains they decide to take the offer. But, Brady becomes too bossy and Boomer creates his own team.

Brady and Boomer try to recover a lost medallion that is sacred to the island but Brady, along with Mikayla, is kidnapped by the Tarantula people. Meanwhile, Lanny embarrasses Mason by showing an old workout video that features him in it.

A pirate gives Boomer and Brady a riddle to solve that supposedly will lead them to a magical coin but the puzzle is actually a trap to ensnare the brothers so the pirate can steal the royal treasure.

Brady and Boomer want to join the Riptides, a gang famous for pulling pranks all over the island. Their final test before they will be accepted into the gang is stealing Yamakoshi; Lanny's pet fish.

Brady and Boomer decide that their island needs some fun, so they decide to pull pranks on everyone. No one likes their pranks, but the kings fear that bad karma is coming their way. Meanwhile, Mason gets addicted to a video game.

Brady and Boomer head back to their high school prom in Chicago to flaunt their royal status. Boomer chooses a girl named Rebecca, who he thinks he once had a date with and Brady chooses Mikayla.

The kings must perform for the islanders at the Annual Harvest Festival, and Boomer can't wait to show off his singing skills. Brady knows Boomer has a horrible voice, but doesn't have the heart to tell him. When Brady's plan to protect his brother from humiliation backfires, Boomer discovers Brady is a terrific singer and arranges for Brady to sing to the kingdom.

Feeling homesick, Boomer and Brady call Aunt Nancy and Uncle Bill to check in, but accidentally end up scaring them with their tales of Tarantula people, quick sand and giant bugs. While Aunt Nancy and Uncle Bill rush to the island to bring the twins back to Chicago, Brady is accidently stung by a dangerous Waka Waka bug. With the help of Mason and Mikayla, the kings must hide Brady's strange side effects including pumpkin head and amnesia in order to prove that the island is safe enough for the kings to stay and rule. Meanwhile, Mason has a date with a girl named Stewy.

After watching a scary movie, Brady thinks the castle is haunted. When Lanny takes him to a evil arts woman to prove to Boomer the castle is actually haunted, he brings back a ghost but not the one he intended.

The kings try to boost thier approval ratings.

Boomer and Brady join the Kinkow Fight School

Boomer and Brady discover Vault 14, a secret vault which protects Kinkow's most mysterious and powerful artifacts. They find the Duplicatus Plantus, a plant that copies anything it touches and make clone of themselves. The clones fill in for Brady and Boomer so that they can go surfing, However, clones want to replace Brady and Boomer forever.

It's the kings' birthday and for their royal present, they each get one wish that will come true. Right before blowing out the candles, Boomer learns that Brady has been bragging to the entire island that he is the older twin. Boomer uses his wish to find out the truth about who was born first, while Brady's wish is that Mikayla compliments him all day. Boomer travels to the center of Mt. Spew to meet with the volcano's Oracle and learn who is the older king, but the younger brother will no longer be co-king if it is known who the older brother is. So Brady, Mikayla, and Mason chase after Boomer.

While trying to prove that they are the Kings of Legend, Boomer and Brady accidentally bring Zadoc, an ancient evil statue, to life, consequently putting the entire island in extreme danger. The twins cede the throne to Lanny for the better of Kinkow and depart on a balloon voyage back to Chicago for good, until the balloon catches a wind and sends them plummeting straight to the Dark Side of the island.

Zadoc's minions capture Lanny and try to squish him with a huge rock. Lanny hands the throne back to Boomer and Brady. Mason goes after Zadoc and sees Boomer and Brady fight and defeat Zadoc and realizes that maybe they are the kings of legend.

Brady finally musters up the courage to ask Mikalya out, by using a note Lanny wrote for him, but he reconsiders and decides to ask her in person; when Brady attempts to retrieve the note, Mikayla mistakenly assumes the note is from Boomer, and he learns that before dating a girl in Kinkow you must be hunted down by her father. During the night while Boomer is getting hunted, Brady tells Mason that he is the one who wants to go out with Mikayla. Mason starts hunting Brady. Brady spits an egg at Mason, knocking him out. In the morning they go back to the Kingdom and Brady asks Mikayla out but she says no, because he humiliated Mason in front of the people of Kinkow.

The island is infested with giant mukarats after the kings offend the troll people responsible for keeping the creatures under control.

When the Kings' over-the-top spending causes a monetary crisis on Kinkow, Lanny has the islanders pay mandatory donations to the kings. Buying time until they find a better solution to fix the crisis, Brady and Boomer disguise themselves as bandits Sirocco and Sirocco Taco, stealing the kingdom's donations and returning the money to the public. With criminals on the loose, the Kinkowians start to get angry and the kings must find a way to restore the island's fortune, capture the criminals and win back their kingdom's support.

Boomer falls in love with a new girl, but the girl claims to be made out of Ice. Meanwhile, Lanny sends a servant to find Mason and Mikalya.

Boomer and Brady are flattered when a pair of cute Queens from the neighboring island compliment their latest ridiculous invention and ask them to be the Kings of Sununu. However, the Kings soon realize that the Queens and their kingdom are victims of a dumb-curse. In order to help cure the entire island of stupidity, Boomer and Brady must solve the Statue's riddle. When Brady gets the riddle wrong so the girls could still admire him and Boomer, the Statue puts the dumb-curse on King Brady, forcing Boomer to get help from Mason, Mikayla, and Lanny to solve the riddle by sunset or else they will be dumb-cursed.

Mason's brother Jason visits, but Mason isn't so welcoming due to an incident when they were kids. When the kings make Jason head guard, Mason quits and drowns his sorrows in eating. But when the Tarantula people try to roast Boomer alive, Jason cowardly runs off and it's up to Brady to convince Mason and his pregnant self to come back and save Boomer. When Mason arrives, he and King Brady are captured by tarantula people. The Jason's water skuter falls on two tarantula persons, and Jason falls on other two.

When Mikayla’s watchful eye keeps Brady and Boomer from getting into mischief, they host an island-wide search to find Mikayla a friend to keep her busy. The Kings soon regret the set-up when her new friend’s ‘beauty over safety’ mantra, puts all of their lives in danger.

Boomer and Brady find an ancient pocket watch.

Mikayla comes down with a fever and starts to turn into a Waka Waka Bug. So Boomer and Brady go to the Waka Waka Bug's hive to try to get the rare medicine to cure her.

Fed up with Brady's unusual habit of becoming a sleep ninja at night, Boomer impulsively moves out. But when his new landlord Charlotte turns out to be a former Tarantula Person and transforms Mason into a cold-blooded terminator, Boomer must turn to his brother for help.

Boomer opens the teen hotspot of his dreams and hires Brady as his assistant. When Boomer fires him, Brady spitefully opens his own club across the way inside a crypt upon being guided there by Lanny. When Brady performs a new song for the crowd with the lyrics having been provided by Lanny, the club is overrun by zombies that have been awakened by the song. Now it's up to Boomer to put his differences aside and rescue his brother.

Brady and Boomer must endure a King Challenge that tests their smarts, strength, and spirits. When Mikayla realizes the boys won’t pass the challenge, she agrees to help them, but the plan goes horribly wrong when Mikayla and Lanny are transformed into Boomer and Brady.

When Mikayla's ex-boyfriend Lucas (a pirate who broke her heart) refuses to participate in the official Kinkowian Dumping Ritual, the kings track him down and discover that Lucas looks just like Boomer. To help out his quest to finally date Mikayla, Brady makes Boomer impersonate Lucas and pretend to go through the official ceremony, but the plan backfires.

The kings want to introduce their subjects to their favorite holiday traditions of Christmas. They enlist the help of the islands giant elves to make the toys. Thanks to bad advice from Lanny, the elves revolt and the kings believe that their Super Christmas is gone only to be rescued by the jolly old elf himself.

Mikayla finally has enough of Brady's constant flirting and tells him that their friendship is at an end and it would be only professional from that point on. Later she and Boomer seem to be getting closer as their share a hobby of Kinkowian poetry slams. Brady in a fit of jealousy, outlaws the poetry trying to end the new friendship. And the fight is on.

When King Brady misses his favorite sneakers it's King Boomer that blames a monster that nobody has seen except him that he calls Mr Boogey. Nobody believes him, thinking he got rid of the stinky shoes. However Mason has been keeping a secret about the creature for years. After Mason is captured by the creature it's up to Boomer to prove Mr Boogey is real.

The kings are trying to act grown-up and impress the ladies only to find out their dates are luring them into becoming the source of power behind a fountain of youth.

When the castle mysteriously explodes, Boomer and Brady are taken to court and forced to relive their most embarrassing and heroic moments through video clips when they try to prove to the jury that they are not guilty of the unlikely event.

Lanny lures the kings into the domain of the Nanju Warrior tribe, which are beautiful young women who have mastered the areas magnetic fields and appear to nearly fly. Unfortunately for Lanny the tribe has high respect for the Kings of Kinkow and it winds up that Brady goes on a date with one of the leaders, Sabrina who is Mikayla's rival from their fight school days. When Mikayla refuses to duel with her Sabrina kidnaps Brady and cages him high in the trees in a trap that is about to fall to his doom unless Mikayla fights. While the two girls battle on land, tree and air, Boomer rescues his brother.

The kings discover that they are about to be forever remembered by their Chicago high school class as having thrown the worst party ever. Against Mason's advice they bring the entire class to Kinkow for the best Beach Party ever. Lanny switches beach signs and the party heads for the hunting grounds of the giant Kinkow Sand Maggot who has its own ideas for party snacks.

Brady tries to unite two conflicting tribes to impress Mikayla, but things didn't go as he planned to be.

The head chef quits when he is ordered by King Boomer and King Brady to prepare a steak cake when he was supposed to be making a very important meal for a giant ogre who is about to wake up from annual 10 year sleep, and when the ogre wakes up and demands food, the kings have to make a dish for him to save the island from his wraith.

When two moons appear, the kings meet the ghost of Malakai, the first king of Kinkow, who explains that an evil twin will destroy the island. After interrogating every twin on Kinkow, Boomer and Brady begin to turn on each other. Following Lanny's advice, the kings journey to the dark side to evil kings castle to sit on the evil throne and learn the truth. The prophecy comes true when the evil king is revealed, putting Brady under a spell and morphing him into evil Brady. With Mason and Mikayla in tow, Boomer heads to the dark side to save his brother and the island from sinking into the seas. Meanwhile, following a dream where she kissed Brady, Mikayla believes she may have a crush on him. Her friend Candace tells her that she does. Later when heading on with Boomer and Mason to save Brady from the evil king Kalakai, an evil Brady engages Boomer in a sword fight. Just before Brady can finish off Boomer, Mikayla gives him a long kiss, breaking him from Kalakai's spell.

Lanny returns from the Evil Castle and uses an Evil Thorn to make Brady evil.

Bad weather stops King Boomer from joining King Brady as he leaves the island for good. A long-lost brother, raised by apes appears keeping it a pair of kings.

Boomer teaches Boz the fine points of being a brother, but breaks one of the bro-mandments.

Boz defies Boomer's warning and goes to the Dark Side. He finds a baby and brings it home, causing the Tarantula People to threaten war because it was their baby prince.

When Boomer and Boz tarnish Mikayla’s chance of beating Mason for “Guard of the Year,” they feel guilty and secretly set out to help her by putting themselves in danger.

A kid from Boz’s past arrives with a devastating secret that could ruin Boz’s reputation.

When Boomer and Boz find out Lanny is mad at them, they buy him his own island. But when they learn that the source of their wealth lives on that island, a gopher that produces gold, they try to get the gopher back without Lanny finding out.

Boz tries to impress his ex-girlfriend with a charade of wealth. She doesn't actually care about Boz and is only there to take his made up riches.

A kid from Boz’s past arrives with a devastating secret that could ruin Boz’s reputation.

When one of the Kings' stunts gets Mikayla suspended, she calls them horrible bosses and quits her job to work at a fast food restaurant.

Boomer, jealous of the attention Boz is getting, enters the Jikki Kiki dance contest, and picks Boz as the second dancer, believing it an easy win, but when Boomer discovers that Boz is a great dancer, a rivalry develops between the two.

When Mason thinks Boomer's club is too rowdy, he takes over as head bouncer, but starts to keep the party out. In order to get Mason away from the club, the Kings lead him on a wild goose chase, leaving the club wide open and vulnerable to a mythical human-like sponge creature named Damone (played by WWE's "The Miz"), who absorbs everyone's confidence.

Boz and Boomer become stuck together after Boz wishes they were closer.

Boz decides to address Boomer's lack of survival skills and forces him to go camping.

Boz's monkey antics ruin a double date.

The kings are transformed into unrecognizable versions of themselves after they fall under a spell, and must dance with the fairest girls in the village to reverse their condition.

When Boz sets out to help Boomer make his childhood dream of becoming a professional athlete come true, Boomer believes he's a natural at the dangerous island sport of Thumb War. With a chance to become a pro thumb warrior, Boomer wagers the castle and loses, only to find he's been conned by a Dark Side crook.

Boomer fears that Mikayla and Boz's budding friendship will blossom into a crush and he'll lose another brother to a Mikayla preoccupation. He gives Boz and Mikayla a Dirt Fairy potion so they'll dislike each other, but the potion is too potent and sends them into mortal combat instead.

When Boomer discovers that he and Boz do not have any brotherly memories like he and Brady do, he sets out to recreate a ski-trip from his childhood. But, when Boomer finds that the land he wants to build his resort on is occupied by Yetis, he removes them from the land and attempts to teach them how to be civilized.

Boomer, Boz, Mikayla, Mason, and Lanny watch Candace's show revealing the mysteries of Kinkow, causing Boz to have doubts about being Co-King. When a temple is discovered belonging to an ancient evil named Kaita the Bat Rider (whose mummy is in the possession of the Tarantula People), Candace is trapped inside and the entrance is sealed by a force field that only the Kings can get through.

Boomer goes to Chicago in an effort to convince Rebecca's father to let him see her after he forbids them to be together. Boz tags along and searches for a safe place to hide the Bat Medallion. Meanwhile, a menace from the past launches a surprise attack on the kings and it is revealed that Rebecca's father used to be part of the Tarantula tribe. As a result, he erases Rebecca's memory of her relationship with Boomer to keep her safe.

The Bat Medallion that Boz in Rebecca's apartment has dragged Rebecca to Kinkow. When Mikayla confiscates the Bat Medallion, Kutamungo captures her and the Bat Medallion in order to revive the Tarantula People's leader Kaita the Bat-Rider. The Kings fear of Kaita the Bat-Rider turns into revenge when they discover the evil Kaita is responsible for their father's death.

With Kaita the Bat-Rider at large with his army of undead zombies, Mason and Mikayla use the forcefield to come up with a counter-attack against Kaita's army. Boomer and Boz also have an encounter with the ghost of their parents who encourage them to use their bond to defeat Kaita the Bat-Rider.