Sonic VS. Metal Sonic!!

'Sonic VS Metal Sonic!! (ソニックＶＳメタル・ソニック！！ Sonikku tai Metaru Sonikku)' is one of the two separate VHS tapes featured in the Japanese release of the Sonic The Hedgehog OVA. In the American version, this episode is edited together with Welcome to Eggmanland to make a feature length direct-to-video film.

Synopsis
After Sonic and Tails defeat the evil Metal Robotnik and meet Knuckles the Echidna, The three heroes travel to the lab in Robotropolis, trying to stop the Robot Generator. There they encounter a mysterious, robotized copy of the original hedgehog. Strange, isn't it?

Story
Entering the core of the Robotropolis, Sonic, Tails, and Knuckles come under attack by Snail Blasters. With Knuckles handling the badniks, Sonic and Tails locate the Robot Generator, which is about to explode. While Sonic manages to shut down the generator in the nick of time, he gets caught in a force-field that electrocutes him. The Robot Generator then crumbles into pieces, with Sonic getting saved from a bad fall by Knuckles. As the dust settles, an ominous figure comes to life inside a sphere in the center of the room. This figure turns out to be Hyper Metal Sonic much for Sonic's, Tails' and Knuckles' obfuscation. Metal Robotnik's husk then teleports into the room, only to crumble into pieces, revealing Dr. Robotnik and Sara in it. Knuckles falsely accuses Sara of being behind the scheme, and in tears, Sara replies that "the robot going haywire were all part of Robotnik's evil scheme", which Robotnik does not deny, proudly admitting the story about the Robot Generator was a trap. As Sonic tries to take down Robotnik once and for all though, Hyper Metal Sonic interrupts him. Robotnik proceeds to explain that the true purpose of the Robot Generator was to copy Sonic's DNA for his Hyper Metal Sonic, thereby creating the ultimate robot that would let the doctor kill Sonic and destroy the Land of the Sky.

Telling his friends to stand back, Sonic engages Metal in a fight. Metal, however, proves to be a formidable foe, easily keeping up with Sonic's speed while Sonic struggles to avoid Metal's attacks. As the battle proceeds to far above Robotropolis, Sonic and Metal end up on the top of a mountain. However, when Sonic loses sight of Metal, Metal appears out of nowhere and kicks Sonic off the mountain and down to the valley below. With that, Robotnik assumes that Sonic is now dead and heads for the Land of the Sky with Metal. Meanwhile, Tails and Knuckles decide to head back to the Land of the Sky. As morning dawns, Sonic wakes up in the forest where he gets a vision of Metal on a rampage, prompting him to set off to stop Metal.

Upon getting back home, Tails and Knuckles find Old Man Owl in Sonic's favorite clothes. Old Man Owl states that he was forced to wear his clothes by Metal, who is now causing destruction around the Land of the Sky. Having the idea to modify Robotnik's Navigator to use against Metal since the Navigator and Metal are built from same mechanical parts, Tails gets to work. Meanwhile, Tails explains to Knuckles that they do not have to worry about Metal and Sonic not being in the same place: since Metal was programmed with Sonic's data, the two of them share identical thought patterns, meaning they can predict each other's actions.

Back in the capital, the President is receiving damage reports from around the Land of the Sky, many of which show a character rampaging through the cities. Mistakenly, the President identifies the character as Sonic and sends his aide to contact him. His aide succeeds, but only manages to tick off Knuckles who is fixing the Tornado. After the President has been told everything that has happened, Knuckles reveals that if Metal wants to destroy the Land of the Sky for Robotnik, he has to blow up the glacial bridge at the north pole which keeps the Land of the Sky's continents connected. If Metal can make one of the local magma veins rush to the surface, it will melt all the ice, causing the continents to separate. The gravitational pull of the planet will then hurtle the continents into space, destroying all of civilization. Sonic then reveals himself in the same room as the President, having heard Knuckles' entire story. Immediately afterwards, the president gets a report of Metal progressing towards the north pole. Sonic quickly gets going, with Tails and Knuckles going after him to stop Metal. Meanwhile, in the sky, Robotnik and Sara are riding Robotnik's hovercraft and watching Metal's rampage. Robotnik then gives a wedding dress to Sara, revealing that he plans for them to get married after destroying the Land of the Sky, thereby leaving only he and Sara to rule Planet Freedom. Needless to say, Sara does not take kindly to Robotnik's idea. Regardless, Robotnik takes both of them to the north pole through a warp zone. On the north pole, Sonic arrives too late as Metal has already managed to make magma erupt precariously close to the glacier's ice bridge. He then encounters Metal, and the two have a long fight. As Robotnik and Sara warp to the north pole in a haphazard way, Sonic and Metal crash into the Egg Mobile, with Sonic making a painful landing. As Robotnik tries to catch Sonic, Sara falls off the Egg Mobile, but gets saved by Knuckles. Tails, piloting the Tornado, also arrives to help Sonic, but gets shot down by one of Robotnik's Egg Mobile missiles. After saving Sara, Knuckles successfully redirects the flow of the magma away from the ice bridge by digging tunnels beneath it upon Sara's flirtatious request. Meanwhile, Sonic and Metal continue to clash violently. Eventually, Sonic starts to get worn out, allowing Metal to gain the upper hand. However, Tails is able to corrupt Metal's data with the modified Navigator, allowing Sonic to do serious damage to Metal with a rapid Spin Dash. The group then notices the President and Old Man Owl arriving in an air ship which crashes into the ice bridge, leaving the President and Old Man Owl trapped inside. As Sonic and Tails try to save the President and Old Man Owl before the ship can explode, a heavily damaged Metal returns and attacks the duo. Tails tries to use the Navigator against Metal again, but Robotnik manages to destroy it, leaving Sonic to fight Metal again. This time around, Metal has accumulated too much damage and Sonic is able to overpower him. However, Sonic is too late to save the President and Old Man from their ship before it explodes. In a twist of fate, Metal saves both of them from the ashes of the aircraft, and Sonic realizes that Metal does have emotions, as he was programmed with his personality and thoughts. However, Metal gets knocked into a subglacial volcano by debris, where Sonic tries to save him by lowering himself down and getting Metal to grab his hand to pull him out. However, Metal pushes Sonic's hand away and tells him that "there is only one Sonic" before he is destroyed by the rising magma, much to Sonic's dismay.

After the incident, the group watches the ice bridge which has been saved from destruction, although Sonic is distracted by Metal's death. As Tails and Sara try to cheer Sonic up, Robotnik arrives, noting that he still has Sonic's data on a small compact disc, and reveals his plans to create an even stronger Metal Sonic. Unfortunately for Robotnik, one of his design-faulty missiles blows up the CD, thwarting his plans. After that, Knuckles hits Sonic on the head as payback for stepping on his head during his fight with Metal, and the two chase each other. The whole cast is then seen following behind Sonic, before Sonic races off.