Sega Superstars

 Sega Smash Bros.  is a 2016 American animated action comedy crossover film that is directed by Phil Lord and Christopher Miller. As a crossover film of six of Sega's franchises, it is produced by Amy Pascal with a screenplay from Lord and Miller and is the final film in Chapter I of the Sega Cinematic Universe. Executive produced by Brad Bird, the film stars Robert Pattinson, Christina Ricci, Jim Carrey, Tom Kenny, Gary A. Hecker, Idris Elba, Max Charles, Emma Stone, Anna Faris, and Thomas Brodie-Sangster voicing all of the characters from the Sonic the Hedgehog, Nights into Dreams, A Spy Movie, Ecco the Dolphin, Super Monkey Ball, and Alex Kidd franchises by Sega. Characters that appeared in Sonic the Hedgehog Chaos and Project Shadow are Rouge the Bat and E-123 Omega, respectively. The film focuses on all of the characters getting transported to Mobius, a mysterious and grassy planet with animals similar to Earth where the deceased Ivo Robotnik's former robot henchman Egg Robo and Alex Kidd's enemy Janken the Great planning to take over the planet for slavery.

Plans of a crossover film featuring Sega's characters was hyped up by fans as well as Tom Kalinske. In 2013, admist the release of Sonic the Hedgehog Chaos, a crossover film behind Sega's characters was announced taking "10%" inspiration from The Avengers. Production started in September of that same year with Phil Lord and Christopher Miller, who had just finished working on The Lego Movie, they signed onto the project with many of the cast members set to star including Anne Hathaway as Rouge the Bat and Vic Mignogna as E-123 Omega from the Sonic the Hedgehog franchise.

Plot
Taking place after the events of Project Shadow, Sonic, Tails, Knuckles, Amy, Shadow (who has gained back his memory) and newcomers Rouge the Bat and E-123 Omega are having a picnic on a hill on the 4th of July at 7:00 PM, watching as the fireworks start to rise in the sky. Along with the characters, the Master Emerald that Knuckles is guiding is there as well. At 8:00, the Master Emerald disappears from Knuckles' hands. The others try and help him look for it but are not able to find it. Rouge finds Doctor Ivo Robotnik (who is deceased)'s former robot henchman Egg Robo going in the Egg Mobile carrying the Master Emerald. Knuckles tries to beat up Egg Robo by punching him in his Egg Mobile and retrieving the Master Emerald, but just before Knuckles punches Egg Robo, the Master Emerald falls down and shatters into several pieces. Before anybody can react, the Master Emerald's shards are bought together and used to form a dimensional portal. Egg Robo is first sucked in and then Knuckles, Shadow, Amy, Omega, Tails, and Rouge. Sonic tries to run from the portal but is still swept. In the other universes, the others are also sucked in by the portal. Alex Kidd and his friend Patrick, Ecco the Dolphin and Grendor, Monkey, Jessca, Michael, and David, Rex and Tommy, and a new person, Nights.

Sonic, E-123 Omega, and Shadow are transported to a grassland environmet. Omega reads his scanners and says that they are in the planet Mobius, a dwarf planet in the Solar System that is close enough to the sun to contain life on it. Just when Omega says this, Sonic and Shadow are greeted by several little animals. Shadow reports that they must find Rouge, Knuckles, Tails, and Amy before anything bad happens to them and they go on their quest. Alex Kidd and Patrick are transported in the middle of the ocean on a boat with a skeleton on it, now knowing that the boat was inhabited. They throw the skeleton off the boat and into the ocean and Patrick sees land. They both start paddling to land with Alex using his punching abilities to paddle faster. They paddle to a jungle. Deep in the jungle, Tommy and Rex have also been transported there, with Rex being mad that his suit has been ruined by the dirt. Tommy thinks that they are in the Amazon Jungle but they are disproved when Monkey comes swinging in with Jessca, Michael, and Mlike following him trying to stop him. Monkey treats Tommy and Rex as a threat (never seeing a human before) and start fighting them. Alex and Patrick see this but try to get away until Mlike sees them and starts chasing them until Alex punches Mlike down to the ground.

Nights, Amy, and Rouge are transported to the desert where they introduce each other to Nights. Nights is an Nightmaren from the mysterious world of Nightopia where she can speak some words. Nights is a they/them and cannot fly in the real world unlike in the dream world. Janken the Great, Alex Kidd's enemy, is also in the desert and assaults them telling them where he is. Amy and Rouge take the upper hand of Janken while Nights is afraid to fight someone. Just when they're about to beat him up, Egg Robo comes in and steals Janken away. Rouge comes up with the declaration that they have to find Sonic and the others. Amy and Nights are already starting to get sweaty so Rouge flys them across the desert. Ecco the Dolphin and Grendor the Old Fish are found in the desert lake by Nights. With their magical power, Nights give Grendor and Ecco the power to live on land and water. They both thank them and they continue on their quest. Sonic, Omega, and Shadow go across the ocean and find Monkey, Jessca, Michael, and Mlike. Unlike with Rex and Tommy, they befriend each other with them being antrophromorphic.

At the desert where Amy, Rouge, Nights, Ecco, and Grendor are gone, Egg Robo and Janken the Great land at night. Janken and Egg Robo team up and then use Ivo's former badniks to build a base in the desert. Alex and Patrick, still on the jungle try to find a way out with Rex and Tommy who survived the attack with Monkey but run into Tails and David who introduce themselves. Sonic, Omega, and Shadow run into Tails and hug him while also saying hello to Alex, Patrick, Rex, and Tommy. Monkey, Jessca, Michael, and Mlike have stolen the trio's boat not knowing it was there and they sail to another place. Rex, David, and Tommy help Omega, Tails, Shadow, and Sonic build another boat. Nights, Amy, and Rouge are out in a grassland and find buildings which mean civillization. They're in a city called Mobia where they meet the mayor Wes Weasley

Sonic the Hedgehog

 * Robert Pattinson as Sonic the Hedgehog and Shadow the Hedgehog
 * Gary A. Hecker as Egg Robo and Badniks
 * Idris Elba as Knuckles the Echidna
 * Anna Faris as Miles "Tails" Prower
 * Emma Stone as Amy Rose
 * Vic Mignogna as E-123 Omega
 * Anne Hathaway as Rouge the Bat

Alex Kidd

 * Max Charles as Alex Kidd
 * Noah Schnapp as Patrick
 * Samuel L. Jackson as Janken the Great

Ecco the Dolphin

 * Tom Kenny as Ecco the Dolphin
 * Billy West as Grendor the Old Fish

Super Monkey Ball

 * Charlie Adler as Monkey
 * Avril Lavigne as Jessca
 * Tom Kenny as Michael
 * Jim Carrey as Mlike
 * Jack Black as David

A Spy

 * Jim Carrey as Rex
 * Thomas Brodie-Sangster as Tommy
 * Jill Talley as Lillian

Nights into Dreams

 * Christina Ricci as Nights