Metallix

Overview
Metallix is the main antagonist of the Super Mario Bros. Z Reboot. Created by Dr. Eggman, Metallix was originally a less superior robot called Metal Sonic. After meeting defeat several times at the hands of Sonic the Hedgehog, Metal Sonic fused himself with several other Sonic-based robots, creating Metallix. Its main goal is to gather all of the Chaos Emeralds to achieve a perfect form.

History
Metallix is one of the many robotic duplicates of Sonic the Hedgehog created by Dr. Eggman, intended to defeat Sonic utilizing his own abilities against him. Metallix originally was a less powerful robot called Metal Sonic, who through frustration and determination decided that his power alone was not enough to successfully combat Sonic's strength. Through an act of disobedience towards Dr. Eggman, Metal Sonic fused with other failed Sonic-based robots and became the being known as Metallix.

Metallix Saga
Metallix teleported from Mobius into the dimension of the Mushroom Kingdom in pursuit of the Chaos Emeralds. Immediately after its arrival, Metallix spotted a lone Goomba holding the Blue Chaos Emerald. When Metallix demanded the Goomba to hand over the Chaos Emerald, the Goomba shivered in fear and confusion. As the Goomba continued to shake in fear, Metallix killed him with a blast of energy, showing off his ruthlessness.

Metallix later looked over the wilderness of the Mushroom Kingdom, observing his Chaos Emerald. After contemplating his next move, he took off into the distance.

Metallix later fires a set of missiles at Luigi and Yoshi, who are fighting Wario and Waluigi over the White Chaos Emerald, sending Wario Bros. blasting and causing Yoshi to fall into deep into the Grassland's forest. Metallix arrives and demands the Chaos Emerald from him. Yoshi refuses to hand the Emerald over, earning Metallix's ire and prompting him to attack. Yoshi is punched and sent flying through several trees before crashing into a wall. He gets up quick enough to watch Metallix trying to retrieve the Chaos Emerald. Using his tongue, Yoshi snatches the Emerald before Metallix does, and places it in his mouth. Metallix demands Yoshi to spit the Chaos Emerald out. Despite having his life threatened, Yoshi boldly swallows the Emerald and belches in Metallix's face. Amused, but unfazed, Metallix decides to simply kill Yoshi and take the Chaos Emerald from his 'mutilated carcass'. Yoshi then uses his Egg Roll and escapes as he is hounded by an onslaught of bullets from Metallix's arm-mounted mini gun. He barely manages to escape the line of Metallix's mini gun fire. However, Metallix fires four missiles from his missile launcher on his shoulder, with the missiles striking Yoshi in his Egg Roll. Metallix catches up to Yoshi before kicking him to the air, and uses a combination of V. Maximum Overdrive Attack and Homing Attack techniques to send him crashing hard into the ground leaving Yoshi unconscious. However, as soon as Metallix starts to approach the seemingly defeated Yoshi, the White Chaos Emerald in his stomach suddenly begins to shine, causing the stomach to drastically agitate, while Yoshi wakes up and suddenly powers up due to involuntarily managing to tap into the energy of the Chaos Emerald; thus transforming into Chaos Yoshi. With the power of the Chaos Emerald enhancing his strength and speed, allowing him to fly, while enveloping him in a golden aura, Yoshi manages to overwhelm Metallix by throwing explosive eggs at him. However, Metallix was only angered and annoyed by Yoshi's offense, and taps into the power of the Blue Chaos Emerald located in his reactor core on his chest. He uses the Chaos Energy in order to dominate and brutally torture Yoshi by far. Yoshi, who received severe damage and a black eye in battle, manages to try to catch Metallix with his tongue in order to swallow him and turn him into a big Yoshi egg, with the egg ready to explode due to the Yoshi's Chaos form. Witnessing this, Yoshi throws the egg with the robot inside at a nearby cliff, with the big egg making a massive energy blowout upon impact, seemingly destroying the evil robot.

Yoshi manages to survive from the explosion. Feeling no traces of Metallix's presence, the severely injured and exhausted dinosaur believed that he has emerged victorious from the fight, while trying to leave the battle zone full of rubble. But shortly afterwards, Yoshi hears a frightening sound from the huge inferno behind him, with the demonic robot coming out of the ravaging fire with clear intentions to kill displaying in his glowing red eyes. Yoshi tries to escape in anguish and horror, but Metallix blocks his way. Yoshi tries to catch him with his tongue again, but the robot manages to catch his tongue and give Yoshi a prolonged brutal beating. Metallix throws Yoshi into a cliff by rapidly releasing his tongue, and savagely strikes Yoshi in his stomach by copying his Ground Pound, causing him to spit out the White Chaos Emerald while Metallix quickly catches it and teleports it into his reactor core for storage. To make the beatings even more brutal, Metallix proceeds to power up with both the Blue and White Chaos Emeralds via his Ultra Combo technique, and launch crushing blows at the dinosaur, following by taking him high into the air and savagely throwing him with gigantic force to the plateau, destroying it and thus ending the battle.

Metallix comments how he has two of the seven Chaos Emeralds, and how close he is to having his completed power. He laments how it took him longer than anticipated to beat Yoshi and take the Emerald, but dismisses it as a minor set back. Hearing a groan, Metallix turned to find the dinosaur still alive, crawling despite receiving life-threatening injuries. Metallix, who witnessed this, approaches and grabs Yoshi by the neck. Suddenly, Metallix decides to fatally punish Yoshi for his opposition and refusal of giving him the Chaos Emerald by strangling him to death. As Metallix sadistically enjoys Yoshi's slow and agonizing death, he suddenly releases him when he detects the approach of Sonic and Shadow accompanied by Mario and Luigi. Irate, Metallix decides to fight for a moment, but then changes his mind and searches the other Chaos Emeralds instead, and flies away to continue his search.

Powers and Abilities
Being based off of Sonic and his fr'iends data, Metallix posessess many of the same abilities as Sonic and Shadow, such as incredible speed and the ability to use chaos control. Additionally, Metallix has the ability to create energy blasts, as first demonstrated in Episode One: Fierce Battle Between Fierce Rivals! when he annihilates a lone Goomba with a red energy blast.