A small spaceship docks at a refuelling station, carrying four aliens: Bernard, Sandra, Desmond, and Julian. During a particularly tedious period at the station, Sandra, Desmond, and Julian begin playing with the ship's controls, while Bernard goes outside to play a game of spaceball. Their recklessness causes a malfunction that disconnects Bernard's part of the ship, leaving him stranded, while the other three crash-land on a nearby blue planet — Earth. The trio arrives in the United Kingdom, where their unusual appearance immediately draws attention. They are captured and interrogated in a secret government facility. Threatened with murder by a paranoid American colonel, they escape with the assistance of a hapless TV reporter, Graham Sweetley. Following their escape, they become instant celebrities, despite offering no technological knowledge or significant insight to humanity. Sweetley becomes their manager, organizing appearances and performances, and the aliens quickly achieve fame and wealth, entertaining audiences who are fascinated by their novelty rather than their abilities. Meanwhile, Bernard arrives on Earth separately, landing in the United States. Despite being the most intelligent of the group, he receives no recognition or celebrity. His claims of being an alien are dismissed, and he experiences homelessness and a brief stay in a mental hospital. Near the end of the film, Bernard reunites with his companions in the UK. Sandra, Desmond, and Julian, fearing that Bernard’s presence might diminish their fame, initially conceal that he had been traveling with them all along.

In 1998, a young LeBron James attends a youth league basketball game. His friend Malik gives him a Game Boy, which LeBron plays with until the coach demands that he concentrates on the game. LeBron misses a potential buzzer beater and is reprimanded for being unfocused. In the present day, LeBron encourages his sons, Darius and Dominic, to pursue basketball careers. While his attempts with Darius are successful, Dominic (Dom for short) aspires to become a video game developer. The Jameses are later invited to Warner Bros. Studios to discuss a film deal. LeBron rejects the idea while Dom is interested in the studio's software, particularly its AI, Al-G Rhythm. Dom and LeBron argue, with the latter revealing resentment towards his father's advice. Having become self-aware and desiring more recognition in the world, Al-G lures the duo to the server room and traps them in the studio's "Serververse". Al-G takes Dom prisoner and orders LeBron to form a basketball team to compete against his own, only earning his freedom if he wins, before sending him to Tune World. Upon his arrival, LeBron allies himself with its sole inhabitant, Bugs Bunny, who explains that Al-G persuaded the other Looney Tunes to leave their world and explore the Serververse. Using Marvin the Martian 's spaceship, the duo travel to various worlds to locate and recruit the other Looney Tunes to form the Tune Squad. Meanwhile, Al-G manipulates Dom into recreating his basketball-based video game, Dom Ball, inside the Serververse. The duo create a highly powerful team which Al-G intends to use against LeBron. In Tune World, despite Bugs's protests, LeBron insists on teaching the Tune Squad the fundamentals of basketball. They soon oppose Al-G's team, the Goon Squad, composed of avatars based on real basketball players and led by Dom. Al-G converts Tune World and the rest of the Tunes to computer animation, live streams the game and abducts real-world people, including the other Jameses, into the Serververse. Al-G threatens to delete the Looney Tunes and imprison the spectators permanently if the Goon Squad wins. The Goon Squad use their abilities to score extreme "style points", ending the first half with a 1039–37 lead. LeBron realizes his mistake and allows the Looney Tunes to use their cartoon physics during the second half. They rally and take the lead. During a time-out, LeBron apologizes to Dom for not listening to his ideas. Dom forgives LeBron and joins the Tune Squad. Al-G takes control of the game and demonstrates a new ability to undo Tune scoring, effectively thwarting any further efforts. With ten seconds left in the game and the Tune Squad down by one point, a bug in Dom Ball's code, where a character is terminated and the game crashes after a specific move is performed, is recalled. LeBron volunteers to perform the move, uncertainly declaring that it will not affect him due to originating from the real world. However, Bugs intercepts a pass and does the move himself, sacrificing his life. Bugs, Al-G and the Goon Squad are all terminated as LeBron scores the winning point with Dom's help. The Looney Tunes and their world are restored and LeBron, his family and the other real-world spectators are returned to the real world. One week later, LeBron, respecting Dom's wishes, allows him to attend the E3 Game Design Camp. He subsequently encounters Bugs, who reveals that his cartoon physics allowed him to regenerate and that his friends have also entered the real world. LeBron, having accepted the Looney Tunes as his extended family, allows them to live with him temporarily.

Following the impact of a meteorite into Earth 65 million years ago, the universe is split into a pair of parallel dimensions. Surviving dinosaurs escape into the new dimension, evolving into a humanoid race and founding a city known as Dinohattan. In 1973, a mysterious woman leaves a large egg and a fragment of the meteorite at a Catholic orphanage in Brooklyn, New York City. The egg hatches into a baby girl. Twenty years later, Italian-American brothers Mario and Luigi working as plumbers in Brooklyn are close to being driven out of business by mafioso Anthony Scapelli's construction company. Luigi meets Daisy, a New York University archaeology student who shows him she has been excavating for dinosaur bones under the Brooklyn Bridge. There, they witness Scapelli's cronies sabotaging it by leaving the water pipes open. Mario and Luigi fix it, but Iggy and Spike —henchmen and cousins of President "King" Koopa, the illegitimate leader of the other dimension—kidnap Daisy after mistakenly kidnapping other girls, including Mario's girlfriend, Daniella. The duo pursues them through an interdimensional portal to Dinohattan, where they lose track of Daisy and her necklace, which is stolen by Big Bertha, the bouncer of a local nightclub. Daisy learns she is descended from dinosaurs and the long-lost princess of the other dimension. Her father, the king, was devolved by Koopa, then a general in the king's army, into a fungus that has since spread across Dinohattan; her mother, the queen, took her to Brooklyn, only to be crushed to death when the portal was sealed. Iggy and Spike realize that they lost Daisy's necklace, which contains a fragment of the meteorite that will allow it to merge the dimensions. They believe only Daisy can do so because of her royal heritage. Mario and Luigi break out of the city's local prison and go to rescue Daisy, aided by the fungus as well as Toad, a good-natured guitarist who was devolved into a Goomba, a semi-humanoid dinosaur, as punishment for his protests against Koopa. Daisy's escape attempt is aided by Yoshi, a pet of the royal family, and Iggy and Spike, who decide to turn on Koopa following their cousin's use of the (d)evolution gun to enhance their intelligence. While Luigi rescues Daisy, Mario saves Daniella and the other girls who were mistaken for the princess. Koopa's jealous girlfriend, Lena, tries unsuccessfully to kill Daisy, then obtains the fragment with plans to overthrow him, but is fossilized when she merges the dimensions. In Brooklyn, Koopa attempts his takeover, but Luigi and Daisy remove the fragment from the meteorite, and the dimensions separate. Toad gives Mario and Luigi handheld devolution devices, and they defeat Koopa by devolving him into a Tyrannosaurus rex, then primeval slime. Daisy's father is evolved back to normal and regains his position. The citizens celebrate and immediately destroy anything involving Koopa. Daisy decides to stay in Dinohattan and kisses Luigi goodbye as she opens the portal for him and Mario to return home. Three weeks later, the Mario brothers are heralded as heroes. Daisy arrives at Mario and Luigi's apartment in Brooklyn and asks them to help her on a new mission. In a post-credits scene, two Japanese businessmen approach Iggy and Spike for permission to develop a video game based on their experiences; they christen the game Super Koopa Cousins.

A young Mexican nun, named Sister Sarah, is neglected and abused by a corrupt priest who produces and distributes heroin. After a bad drug deal, she is handed over to thugs to be used as an instrument as sex for money. On the verge of death after being heavily drugged and wounded and raped, the nun receives a commandment from God to take revenge. Acquiring heavy weapons (including big guns and vibrators), Sister Sarah sets out to kill those who had abused her and are using the church for their own personal gain. The frightened drug lords in the church hire "Los Muertos", a violent motorcycle gang, to track her down and eliminate her. Los Muertos' base of operations is the local brothel "Titty Flickers", where they try to gather more information on the vigilante nun. After being wounded in a shootout, Sister Sarah hides out in a fleabag motel where she recovers and finally achieves vengeance by killing Los Muertos, emasculating the gang's leader Chavo, and saving her female lover who had been raped. But in the final scene, the cardinal drug lord, known only as the Monsignor, hires another hit man to track down the vigilante nun, setting up a sequel hook.

Ward Jones lands his light aircraft at an airfield in Monte Carlo, but it is destroyed following a collision with a remote controlled car operated by Thayer, a member of the secret THANATOS organisation. Jones dies in the explosion, and a package is retrieved from the wrecked aircraft by Thayer's henchwoman Maya. In a medical conference in Monte Carlo, Jones' girlfriend Yachuko escapes from Thayer's henchmen, aided by cosmetic surgeon Neil Connery. She is later kidnapped by British agent Miss Maxwell, but another of Thayer's henchwomen, Krayendorf, then captures Yachuko. Connery meets Maxwell and her boss Commander Cunningham. Jones had wanted to sell them the package and asked them to protect Yachuko, who also had access to relevant information. Connery believes that Jones has transferred the data to Yachuko using hypnosis. Cunningham demands that Connery help retrieve the information. After being reminded that he killed one of Thayer's henchmen in a fight at the conference, Connery agrees to help in exchange for the police investigation being dropped. Cunningham dispatches Connery to Malaga where Yachuko has been spotted. Connery and Maxwell are met by Juan, who has left his wedding early to greet them. Thayer's henchwoman Mildred has followed them to Malaga, but Connery hypnotizes her to reveal Yachuko's location, Krayendorf's castle. Firing an arrow, Connery short-circuits the electric fence protecting the castle and destroys its defensive machine gun position. Connery, Maxwell, Juan and their colleagues then attack the castle and defeat Krayendorf's henchmen. Juan kills Krayendorf and Connery rescues Yachuko. Using hypnosis, he accesses most of the critical information, but Mildred kills Yachuko before the process is complete. Juan then kills Mildred. Meanwhile, an "atomic nucleus" is being transported by American military police. Maya and more henchwomen dress up as can-can dancers, lure the MPs from their vehicles and steal the nucleus. With it, THANATOS can now power their "ultra-high-frequency magnetic waves", which will cause all metal machines to stop working. This will force world leaders to give THANATOS their gold. Following up information revealed by Yachuko, Cunningham persuades Connery to travel to Tétouan, Morocco, where Thayer owns a rug factory staffed exclusively by blind men. Goons try to kill Connery in the street, but he is rescued by Maya. THANATOS leader Alpha wants Connery dead, but Thayer wants to keep him alive. Connery attends a party hosted by Thayer, who resents Alpha's power. He is plotting to replace Alpha with a double, and Connery is required to change the man's face. Thayer also plans to murder his henchwomen, a fact that Connery passes on to Maya. Disguised as a blind Moroccan weaver, Connery infiltrates the factory, where the workers are in contact with dangerous radioactive materials. Connery warns a worker, who soon instigates a riot. Connery is eventually captured by Thayer. Later, at a yacht, Connery is to be forced to transform Thayer's henchman Kurt into an Alpha lookalike. Before the operation begins, Connery hypnotises Kurt, causing him to attack Thayer. Meanwhile, the female crewmembers of Thayer's yacht attack their male counterparts. The women take over the yacht, but Thayer escapes in a rubber dinghy. Alpha blames Thayer for his failure and demands that he kill himself. Thayer kills Alpha instead and takes control of THANATOS. Connery and Maya meet Juan in Munich, where they are also joined by the Scottish members of a Monte Carlo archery club. Using a Geiger counter to detect the radioactive rugs, Connery and Maya locate THANATOS's secret lair. Meanwhile, Thayer triggers the magnetic wave, paralysing machinery all over the world. Guns are no longer operational, so bows and arrows are now optimal weapons. Connery, Maya, Juan and the archers enter the base. While the archers tackle Thayer's henchmen, Connery plants an "anti-magnetic explosive" to stop the wave. He is discovered by Thayer and they fight, culminating in an archery duel in which Thayer is killed. Connery, Maya and the surviving archers escape from the base, which explodes. Cunningham wants to recruit Connery as a permanent agent, but Connery uses his hypnotic powers to dissuade him. Maya and Connery depart on Thayer's yacht for a romantic cruise.

Johnny Van Owen is a rapper who drifts from city to city. Johnny is performing at a nightclub, rapping and dancing with his crew and a club background singer playing " Cool as Ice (Everybody Get Loose) ". While the group passes through a small town, Johnny falls for honor student Kathy Winslow. The crew is stranded in the town after Jazz's motorcycle breaks down and has to be left at a local repair shop. While waiting for repairs, Johnny uses the opportunity to see Kathy. She already has a boyfriend named Nick, whom he advises Kathy to dump. Johnny shows up with his crew at a local club frequented by Kathy and her friends. Noticing that no one was enjoying the live music playing at the club, Johnny and the crew decide to perform a musical number, "People's Choice", by unplugging the other band's instruments and taking control, shocking the audience and ending with Johnny sweeping Kathy off her feet, humiliating Nick. Nick offers to forgive Kathy and take her home, but she refuses and walks home by herself. Unbeknownst to Kathy, she is stalked by Clarke and Morrisey, two strange men in a car. She is saved by Johnny, who takes her home. At the club's parking lot, a jealous Nick and his friends smash up motorcycles belonging to Johnny's friends. Nick's friends attack Johnny who fights back, leaving Nick and his buddies unconscious and Nick himself in the hospital with a broken nose. Kathy's father, Gordon, becomes suspicious of Johnny, and warns Kathy to stay away from him because they can't trust strangers. The next day, Kathy goes for a ride with Johnny against Gordon's wishes. They ride all over town, including a construction site. When they finally return home, they are greeted by an angry Gordon, who coldly warns Johnny to stay away from Kathy. Gordon, under pressure from his wife Grace, reveals to Kathy the secret of his past—he was once a police officer. They were on the run from the corrupt Clarke and Morrisey and were able to escape using fabricated documents, explaining why he kept his life a secret from Kathy all these years. Kathy criticizes Gordon, saying it was not fair that he lied to her in order to protect her, yet refuses to permit her to see a total stranger. The next day, Johnny agrees to give Tommy, Kathy's younger brother, a ride on his bike. They cruise through the streets, and finally back to the Winslow home, where Tommy is later kidnapped. At the repair shop, the crew prepares to leave town since the bike has been repaired, but they tell Johnny to say goodbye to Kathy. When Johnny arrives at the Winslow house, he finds an envelope meant for the family. It turns out to be a message from Clarke and Morrisey with Tommy recording it. Fearing the worst, Gordon accuses Johnny of criminal involvement, much to Kathy's dismay. When Kathy asks Johnny to play the tape left behind by Clarke and Morrisey, he hears a loud clanging noise from a construction vehicle, revealing the message was recorded at the construction site. The gang ambushes Clarke and Morrisey and rescues Tommy. When the police arrive, the gang return Tommy to the Winslows and Gordon apologizes to Johnny. Johnny tells Kathy he has to move on, but she decides to follow him. Nick arrives in his car, telling Kathy to get used to being a biker chick because she will never see him again. Kathy holds on as Johnny uses the car as a ramp and the two new lovers ride off into the big city. The film ends with Johnny reaching his destination, rapping "Get Wit It" and dancing with his crew to an audience at a nightclub. Kathy joins him on stage after the show is over, dancing alone in the spotlight.

Sir William "Billi" Sedgewick is a veterinarian and resides with Gordon, a goat who behaves like a dog, outside the small town of Catterness, located within the Scottish Highlands. On orders of the Scottish government, beavers have become illegal in Scotland and are to be sent to Norway. During one such removal, a lorry carrying a large group of beavers is involved in an accident, letting loose some beavers. The officers in charge of the operation, McKenzie and McTavish, manage to recapture most beavers, but one escapes. The escapee, Bessie Boo, is subsequently adopted by a family of rabbits. McKenzie, posing as a police officer, mounts an obsessive search for Bessie. Five years pass as McKenzie continues his search for Bessie. Meanwhile, Bessie and the rabbits partake in a tobogganing race. Bessie's adoptive brother, Wee Dave, and their mother fall into a river due to the former's carelessness, leading Bessie to attempt to rescue them. Billi, Gordon, and Billi's grandson, Jake, drive towards Catterness when another rabbit alerts them of the problem. Billi organises a deputation in the town square before noticing McKenzie acting strangely and questioning his identity. During the group's search, Billi finds and resuscitates Bessie's mother and soon locates Bessie and Dave approaching Baron McToff's dam. McToff, despite his protests, accepts Billi's demands to turn off the turbines. The group manages to rescue Dave, only to miss Bessie. Gordon bungee jumps down to catch Bessie but falls into the river. The group retrieves Gordon, but they are distracted by a submarine. Billi gathers a group to save Gordon with a trampoline, but Gordon gets knocked out. Victoria, a pilot duck assisting with the group's rescue, throws Billi a bottle of water, which he uses to revive Gordon. Lady Serena, Billi's daughter, hands Bessie to the submarine's pilot, but McKenzie absconds with Bessie. McKenzie then hijacks Billi's Land Rover, causing Billi to give chase in his Aston Martin and eventually on his skateboard across the Highlands. Ending up outside a military base, McKenzie tries to have Billi arrested before they are both confronted by the police. McKenzie is arrested for his crimes, while Billi promises to reunite Bessie with her family. The townspeople celebrate their victory at the Catterness Inn while Bessie gets returned to her mother. Billi and his consort, Toni Turner, leave the celebration to drive off into the moonlight.