Welcome to Eggmanland

Welcome to Eggmanland (エッグマンランドへむかえ Eggumanrando e Mukae) 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 Sonic VS. Metal Sonic!! to make a feature length direct-to-video film.

Synopsis
When Sonic and Tails hang out at the beach, Old Man Owl crashes in with an emergency from The President. Sonic decides to go to the Presidential House to see what is going on. Upon arrival, the evil Dr. Robotnik sits in the chair, he needs the duo's help. They have to defeat Metal Robotnik and deactivate the Robot Generator.

Story
Deep inside Robotropolis, Dr. Robotnik has finished his latest creation, Hyper Metal Sonic, in an attempt to kill Sonic the Hedgehog. However, according to Robotnik, the one thing he needs to complete Metal's AI is to infuse it with Sonic's life data.

On a lonely island located in The Land of the Sky, Sonic is relaxing on a beach chair and listening to radio outside the ruins of a crashed Boeing 747 and USS Enterprise, which serves as his house. Tails comes out to test his new, jet-propelled body-board, asking Sonic to give it a try, but Sonic declines due to his dislike of water. While testing the body-board, Tails collides with Old Man Owl who is flying around the island in small aircraft. Being a blind owl, he does not notice his aircraft's engine is on fire. With Sonic being uncooperative, Tails tries to help Old Man Owl on his own. As both Tails and Old Man Owl are about to collide with a steep cliff, however, they are rescued by Sonic. Afterwards, Old Man Owl gives Sonic and Tails emergency news from the President, who wants to meet Sonic right away. Both Sonic and Tails thus promptly fly to the presidential house located in the capital city of South Island. As they arrive at the presidential house, Sonic and Tails encounter Dr. Robotnik and his robotic guards who hold the President and his daughter, Sara, hostage. On the President's request, Sonic begrudgingly hears Robotnik out, who elaborates on how their planet, named Planet Freedom, is split into two dimensions: the Land of the Sky and the Land of Darkness. The doctor then explains that his capital city in The Land of Darkness, Robotropolis, has been seized by Metal Robotnik and his demonic robots, who drove Robotnik and his guard robots out of the city. Robotnik also explains that Metal Robotnik has sabotaged Robotnik's Robot Generator by overloading it with energy, which according to Robotnik's calculations, would release enough excess electricity to create an explosion that would destroy Planet Freedom before sunrise tomorrow. Robotnik thus proposes that Sonic, being the fastest one around, goes into Robotropolis and shuts down the Robot Generator. While Sonic initially refuses, he accepts the proposal upon the President and Sara's insistence. To help them on their journey, Robotnik gives Tails a Navigator that will lead them to the location of the Robot Generator. Sonic and Tails then promptly head off for Robotropolis in the Tornado biplane. Meanwhile, Robotnik and his guard robots remain in the presidential house where they waste time playing video games with Sara and the President. Suddenly, however, a large mech crashes into the presidential house. With Sara excited about it, she jumps into the mech's control room. Robotnik, however, having an evil scheme in mind, attempts to keep Sara from pressing any buttons, causing them to get stuck inside the mech before it takes off.

Meanwhile, Sonic and Tails enter the Land of Darkness by flying through a large, storm eye-like entrance. After a rough landing that damages the Tornado, the duo proceed through the Land of Darkness on foot while encountering robots, such as a Crawlton and a swarm of Buzz Bombers. Eventually, they enter a warp zone which takes them to the ruins of an ancient abandoned city. There, they encounter Metal Robotnik. Having no time fight Metal Robotnik, Sonic and Tails try to escape it, only for the robot to chase after them.

Along the way, Sonic and Tails get attacked by Metal Robotnik's glue projectiles which get Tails stuck on a fence. Meanwhile, Sonic manages to direct one of Metal Robotnik's missiles back at him, damaging the robot. However, Sonic gets stuck on a piece of road covered in Metal Robotnik's glue as it slowly sides into the sea. Before Metal Robotnik can finish Sonic though, Knuckles enters the battle and frees Tails from the glue projectile before telling him to go help Sonic. Knuckles then tries to fight Metal Robotnik, but is eventually grabbed by the robot. Fortunately, Tails saves Sonic in time for him to use his Spin Attack to cut off Metal Robotnik's hand and free Knuckles. Being outnumbered, Metal Robotnik tries to retreat, but Sonic, with help of Tails and Knuckles, manages to destroy Metal Robotnik completely, with its remains falling into the sea. After a little conversation with Knuckles, Sonic and Tails notice a large amusement city in the far distance which can only be Robotropolis. As Sonic and Tails continue their journey towards the Robotropolis, Knuckles joins them on their quest.