Sonic to the X Side Stories
Disclaimer: Dragon Ball is owned by Akira Toriyama. Sonic the Hedgehog is owned by SEGA.
The Legendary Nikuhog
Two days remain until the Chaos Games. While at a picnic, during a painful singing session courtesy of Tails, a massive ship arrives. Out comes Rob O' the Hedge, one of the few surviving Nikuhogs. He invites Shadow to rule a New Planet Niku. Shadow initially refuses until Rob O' appeals to Shadow's ego by asking him to kill the Legendary Super Hedgehog that has completely destroyed the South Galaxy.
Super Hedgehog Chucky, Future Silver, Tails, a drunk Turtle Hermit, and Hamlin departed with Shadow (Future Silver's reasons being to try and stop his father from doing something stupid, as Silver was suspicious of Rob O'' motives).
Sonic (powered out of his Super Hedgehog form at Sally's request) is waiting with Sally for a school interview to try to get Chucky into the school. Sonic is then called telepathically by King Lazaar and then teleports to King Lazaar's planet. At King Lazaar's planet, King Lazaar explains that he has sensed the Legendary Super Nikuhog in the South Galaxy and he sends Sonic to stop him.
At first, the group believes that Rob O' has good intentions and honestly wants to create a new Planet Niku, besides Future Silver who does not trust Rob O' and tries to stop Shadow. Later on, it is revealed that the planet is on a collision course with a large comet, Black Comet. In addition, Super Hedgehog Chucky, Tails, and Future Silver stumble upon the fact that the city on New Planet Niku is in ruin, and thus obviously not usable. Also, there is slave labor commencing on the planet. Chucky and the others interfere, but a punch to the air from Tails is enough to drive away reinforcements. Tails then begins to show off, until he accidentally punches Sonic in the face when the latter warps in to New Planet Niku, presumably from following the Super Hedgehog's trail.
Soon after Chucky, Future Silver, Tails, The Turtle Hermit, Hamlin, and Shadow arrive; a report comes in that the Legendary Super Hedgehog is attacking another planet. Shadow takes Rob O'' son, Maurice (who is completely covered in a brown cloak), and investigates.
While Shadow and Maurice are investigating the attack on the neighboring, Chucky, Future Silver and Tails go out to investigate the new Planet Niku. They find a slave colony strip mining the planet to send energy to the palace. Chucky, Future Silver and Tails quickly break up the slave labor going on at the colony. This is also when Sonic arrives on the planet to be punched by Tails. Rob O' also first meets Sonic during this scene, and immediately identifies him as Jules' son.
Shortly afterwards, Shadow and Maurice return. Upon arrival, Shadow expresses annoyance at Rob O' for failing to tell him where The Legendary Super Hedgehog is, as he cannot find it without knowing its location. Shadow notes that Sonic is at the palace and expresses annoyance at his presence despite his "not being on the guest list." He then tells Sonic to stay out of his way as he tries to find and kill the Legendary Super Hedgehog. The first time that Maurice sees Sonic he immediately recognizes him and gets extremely angry. A fight almost breaks out between Sonic and Maurice, where Sonic notices all his limbs are robotic, until Rob O' brings the latter back under control by using a mind-control device put on him when he was a teenager.
Rob' O explains to Sonic that when Planet Niku exploded, his son suffered severe injuries saving his life. The only part of his body that could be saved was his brain, so Rob O' transferred it to a robot that would look like Maurice if he could grow up. Rob O' took off his son's cloak and revealed his son's true appearance and his new name, Metal Sonic. Unfortunately for Rob O', Metal Sonic has found a way to bypass the mind-control which the device has over him.
During this scene we are told, by Rob O', other portions of Metal Sonic's past. Metal Sonic apparently was disturbed and emotionally unstable as a kid and blew up at least one planet. During his teen years, when Rob O' tries to restrain Metal Sonic, Metal Sonic then elbows Rob O' causing him permanent blindness and a scar over his left eye. After this incident, Rob O' was struck with the fear of Metal Sonic's unnatural Nikuhog strength, so he was forced to have a scientist develop a ring to control his power, an incident that nearly resulted in Metal Sonic killing Rob O'. However, after the ring worked, Rob O' decided to use Metal Sonic to conquer the universe. Later on that night, Rob O' walks into Metal Sonic's room and tries to figure out why Metal Sonic is resisting his control, until he realizes that Sonic and Metal Sonic were born on the same day. Metal Sonic was born with a power level of 10,000 while Sonic was born with power level of 2, according to two scientists of Planet Niku on the day they were born.
It is said that Sonic cried constantly, keeping Metal Sonic awake for days on end. From then on Metal Sonic would constantly hold a grudge against Sonic, and Sonic's arrival was most likely the reason he was resisting his control. After Rob O' reflects on the past, Metal Sonic attacks Sonic during the night. It is in this fight that we see Metal Sonic in his Super Hedgehog form (Neo Metal Sonic from Sonic Heroes). Towards the end of the fight Rob O' reasserts control over Metal Sonic and forces him to stop attacking Sonic. He barely manages to do so, foreshadowing things to come.
Eventually Chucky, Silver and Tails bring the slaves they freed back to the palace, and they identify Metal Sonic as the one that attacked their planet. Then Rob O' decides to reveal the truth about why he brought Shadow and the others onto the planet. Metal Sonic walks towards Sonic shouting, "Olgilvie!" repeatedly. Metal Sonic goes into his Super Hedgehog form again while in the walk towards Sonic. Shadow transforms into a Super Hedgehog and kicks Metal Sonic on the shoulder, but the attack has no effect. He then fires a Chaos Spear Bomber at Metal Sonic, to no effect as well. Metal Sonic soon rages out of Rob O'' control and becomes a monstrous behemoth of a Super Hedgehog, his most powerful form, the Legendary Super Hedgehog (Metal Sonic Kai from Knuckles' Chaotix). Shadow, stunned by Metal Sonic's power, falls to the ground, eyes wide with fear.
Metal Sonic, raged beyond control, destroys the strip mines and the slaves' home planet. Metal Sonic goes after Sonic and Chucky in a chase, destroying forests and slaves with a barrage of energy blasts. Then Rob O' decides to reveal the entire story to Shadow about his son and his own near-execution at Shadow's father's hands, as well as their desire for revenge, if not for Black Doom, then his son, at least. The chase stops and Sonic turns Super Hedgehog. Chucky powers up and then Silver comes to help and also transforms into his Super Hedgehog form. This is when the action really starts. To make it short, the battle is Metal Sonic in his Legendary Super Hedgehog form versus Sonic, Chucky, and Silver in their Super Nikuhog forms (Sonic stated that Metal Sonic wins round one, but then it gets to round 2). The battle gets intense, but remains completely one-sided.
Then Knuckles shows up after Metal Sonic defeats the boys and saves Chucky from a would-be-fatal attack. Knuckles then gets around to handing out everyone Holy beans. Not long after, the four warriors then decide to gang up on a patient Metal Sonic, who stands on a thin cliff. In only a matter of scenes, all four of them become annihilated by Metal Sonic again; Sonic continuously gets punched in the face, Silver and Chucky are both brutally clotheslined, and Knuckles is kicked twice, and then blown meters away from an Energy Blast into a cliff. Recovering from the blast, Knuckles attempts to get Shadow to fight. In shock, he refuses, and is abandoned by Knuckles. Meanwhile, Sonic is having a hard time doing anything to Metal Sonic, except giving him a good time. Shadow, rediscovers his inner Super Hedgehog pride, transforms into his Ascended Super Hedgehog form once again, and joins the fight against Metal Sonic. His efforts, however, are futile as he is blown directly into a cliff and knocked unconscious. Metal Sonic later finds his father, Rob O', attempting to flee inside a Nikuhog space pod, leaving his son to die in the explosion of the planet. Metal Sonic crushes the pod in return, and throws it directly at the comet.
Knuckles tells everyone to channel their power to Sonic so he can defeat Metal Sonic. One by one they comply, except Shadow. While gathering energy, Sonic suffers at the hands of Metal Sonic; he is blown across the landscape by energy blasts, clotheslines, and very powerful punches. Finally, on the brink of defeat, Sonic convinces Shadow to help him. Sonic then uses all the power that the Freedom Fighters gave him to power one punch, defeating Metal Sonic.
After dispatching Metal Sonic, Black Comet destroys the planet. However, the Freedom Fighters and remaining slaves manage to escape in the Pod Co spaceship Knuckles used to get there. In the end, Sonic and Chucky Mach 5000 back to their house, and ultimately confront an angry Sally. Sonic then tells Sally that his favorite hobbies are reading and sports (the same phrase that Sally wanted Sonic to say at the school interview). Sally then faints out of exasperation.
