Speranza (Spellanza) / MCB

Sidearms Mace: Musclehyde's main weapon made from his vehicle form's crane boom, can be used as both a bludgeon and fire yellow energy beams like a bazooka. When not in use, it hangs on the back and is shortened. The hook attached to the other side remains usable, allowing the crane boom to be used as a fishing rod. Vulcan: An outrigger-style firearm on each of Musclehyde's forearms folded inward when not in use. Weapon Card Weapon Card - Variable Arms (메탈카드 - 베리어블암, Wepon Kadeu - Berieobeul Am): A pair of additional arms that are attached to Musclehyde's back unit, granting him a total of four arms. Weapon Card - Crane Bhuh (메탈카드 - 크레인 부지, Wepon Kadeu - Keurein Buji): An ax made from the blade on the Variable Arms in storage and his mace. Brachio Slash (브라키오 슬래쉬, Beurakio Seullaeswi): Musclehyde's main ultimate skill. He generates green energy around the Crane Bhuh and strikes the opponent with a shockwave powerful enough to fracture the ground. Bronto Strike (브론토 스트라이크, Beuronto Seuteuraikeu): Musclehyde slams the energized Crane Bhuh down, creating a powerful crack in the ground. Dreadnought Storm (드레드노트 스톰, Deuredeunoteu Seutom): Musclehyde rotates the Crane Bhuh so fast that it leaves a green afterimage before attacking.

On planet Machina, Musclehyde was a war correspondent for the Cardian Post, covered a battle between Metal Cardbots and Wild Cardbots. Documenting a Metal Cardbot dying from the Beast Virus, he was spotted by a Wild Cardbot and infected from the Wild Cardbot's claw, which gave Musclehyde his horns. However, he was able to suppress the berserk factor of the virus and regained his sense of awareness not long after. Later, he became one of the three Cardbots Gigantrex asked to join him on his spaceship Speranza's journey to establish a new civilization. Musclehyde acted as the ship's pilot. After the Speranza crashed on Earth due to Red Blitz's failed attempt to save Machina, Musclehyde and his crewmates became friends with the people of Porcaca Village, especially Mukara, who, due to a lack of resources, sealed them with the Metal Breath given to him by Gigantrex and placed stone tablets concealing their Metal Cards in the Porcaca Ruins temple.

Musclehyde is a Caribbean-green/white large Cardbot with a bull motif, a bull-based head with an ax symbol on each side, a guard with an "M"-based symbol on the forehead, yellow eyes, yellow axe-shaped horns, black shoulders and upper arms, golden-yellow circles on the elbows, black hands, two-barreled armor plating on the shoulders and forearms, Caribbean-green/white torso with Caribbean-green markings on the white chest, bull horn-designed buckles on the white hip, white upper legs with Caribbean-green lines, Caribbean-green/white/black lower legs with a golden-yellow horn, two-digit black feet with a Caribbean-green base, and a Caribbean-green/white back unit for his Variable Arms. The horns can change position based on one of his two personalities: when positioned down, Musclehyde is in his docile persona; when the horns are upright, the guard on the forehead comes down and the M glows red, and the eyes become fierce to show his violent personality. His vehicle form is a wrecker crane based on the Kobelco KMG5220. After the Speranza crash-landed on Earth 4,000 years ago, Musclehyde was painted with a symbol representing the crew's bond with Mukara on the right side of his chest. As a former reporter, Musclehyde is intelligent and inquisitive, so he asks plenty of questions when in unfamiliar situations. He is usually composed and courteous, especially to those he feels loyal to, but feels strongly and doesn't hesitate to use force when upset. He can change the position of his horns to help focus his aggression, but it's only symbolic and has no tangible effect.

Sidearms Missile Launcher: Cielo can reconfigure both of his arms into missile launchers to fire energy beams. Goggles: Cielo used x-ray vision to target his opponents through walls or fitted these goggles to his eyes to improve his targeting range. Weapon Card Weapon Card - Nitro Express (웨폰카드 - 니트로 익스프레스, Wepon Kadeu - Niteuro Igseupeureseu): A pair of machine guns. They are firmly fixed through the joints on Cielo's forearms. Sky Jet Shot (스카이제트샷, Seukai Jeteu Syat): Cielo fires arrow-shaped energy bullets from the Nitro Express. The energy bullets are also capable of penetrating concrete in seconds. Homing Magnum (호밍 매그넘, Homing Maegeuneom): Cielo's main ultimate skill, he fires energy bullets with guiding missile properties. Unlike the Sky Jet Shot, which fires continuously, it fires in small amounts to avoid being noticed by the opponent. Sky Jet Kick (스카이 제트 킥, Seukai Jeteu Kik): Cielo utilizes the Nitro Express as boosters alongside her thrusters to execute a charging kick.

On planet Machina, Cielo was a member of Gigantrex's crew and one of the three Cardbots he asked to join him on his spaceship Speranza's journey to establish a new civilization. Cielo acted as the ship's navigator. After the Speranza crashed on Earth due to Red Blitz's failed attempt to save Machina, Cielo and his crewmates became friends with the people of Porcaca Village, especially Mukara, who, due to a lack of resources, sealed them with the Metal Breath given to him by Gigantrex and placed stone tablets concealing their Metal Cards in the Porcaca Ruins temple.

Cielo is a cerulean Cardbot with an air force combat uniform motif, a pilot helmet/hood/cap-based head, green eyes, white upper arms and upper legs, orange colored rims throughout the upper body, silver wrists, black hands, cyan neon lights in the upper body, wings and boosters on the shoulders while still retaining their flight features, crosshair marks on the chest and a green light variant on each side of the head, and black feet with a cerulean base. His vehicle form is a fighter jet based on the Yak-130 light combat aircraft.

After the Speranza crash-landed on Earth 4,000 years ago, Cielo was painted with a symbol representing the crew's bond with Mukara on the right side of his cap crest. Cielo is often impulsive and dives into situations based on his intuition. He makes a conscious effort to get along with humans, but getting along with anyone can be a struggle for him, depending on who it is. Though sometimes slow to warm, once he opens up he is clear about his affection and occasionally teases those younger than him. He is incredibly loyal and always willing to use his strength and skill to defend his allies.

Weapon Card Weapon Card - Boost Gambiera (메탈카드 - 부스트 감비에라, Wepon Kadeu - Buseuteu Gambiera): A pair of taloned feet extensions added to Red Blitz's legs to enhance his kicking power. Scarlet Hurricane (스칼렛 허리케인, Seukallet Heorikein): Red Blitz's main ultimate skill, he creates a whirlwind of red energy and kicks it towards the opponent, knocking them back. Scarlet Typhoon (스칼렛 타이푼, Seukallet Taipun): Red Blitz creates a red energy wheel and kicks it towards the opponent. Crimson Shoot (크림슨슛, Keurimseun Syut): Red Blitz generates and kicks a red sphere to the opponent. Crimson Kick (크림슨킥, Keurimseun Kik): Red Blitz generates crimson flames around the Boost Gambiera and kicks the opponent. Mega Crimson Kick (메가 크림슨 킥, Mega Keurimseun Kik): An enhanced version of the Crimson Kick. Red Blitz increases the output of the flames wrapped around the Boost Gambiera, and executes a kick wrapped in blue flames. Organizer (오거나이저, Ogeonaijeo): A portal device stored inside Red Blitz's chest. It can open and alter the size of a portal by turning the dial.

On planet Machina, Red Blitz was a troublemaker who joined Gigantrex's crew after trying to fight them all single-handedly, and one of the three Cardbots he asked to join him on his spaceship Speranza's journey to establish a new civilization. Red Blitz acted as the ship's engineer. After the Speranza crashed on Earth due to Red Blitz's misguided attempt to save Machina, he and his crewmates became friends with the people of Porcaca Village, especially Mukara, who, due to a lack of resources, sealed them with the Metal Breath given to him by Gigantrex and placed stone tablets concealing their Metal Cards in the Porcaca Ruins temple.

Red Blitz is a red Cardbot with a sleek body based on the Muay Thai fighting style, a sleek head with a golden curving crest along the outer portion and a golden three-grooved symbol with a golden flap on each side, green eyes, black torso, shoulders, arms and upper legs, a red plate with large curving crest and a muscle car engine on the chest and a three red-sectioned plate on the back, black hands with a two-pronged red backhand, red hip with a golden buckle, red lower legs, red armor with wheels on the shoulders and legs, black and gold knee extensions, black feet, and small green lights on the shoulder armor and legs. His vehicle form is a muscle car based on the Toyota 86. After the Speranza crash-landed on Earth 4,000 years ago, Red Blitz was painted with a symbol representing the crew's bond with Mukara on his left shoulder. Red Blitz is an aggressive, impulsive, and impatient Cardbot who is likely to start a fight, being resiliently stubborn to efforts by others to correct him. The sole individual who can command him without getting rebuffed is Gigantrex due to his status as Red Blitz's mentor and father figure. A key problem the group has with Red Blitz is that he rarely thinks things through and is so hyper-fixated on his home and Gigantrex that he tends to behave irrationally and complicate things to an unnecessary degree, including starting fights over something as simple as a misunderstanding. Throughout his time with the team, however, Red Blitz has become a much more reliable Cardbot, and is now capable of acting rationally and tempering his impulses.

Sidearms Rex Blade (렉스 블레이드, Rekseu Beulleideu): A wrist blade that unfolds from the metal panel on Gigantrex's arms. Vulcan: Like Heavy Iron, Gigantrex can fire energy bullets from the exhaust ports on both his shoulders. Weapon Card Weapon Card - Rex Arm (메탈카드 - 렉스암, Wepon Kadeu - Rekseu Am): A large Tyrannosaurus-rex head style gauntlet mounted on Gigantrex's left arm. Its current appearance is a result of being infect by the Beast Virus from Gigantrex fighting a Wild Cardbot. Death Grip (데스 그립, Deseu Geurip): A giant pincer grip Gigantrex uses to crush targets with the Rex Arm's fangs. It has shown tremendous power, enough to destroy Blue Cop S's Justice Gauntlet and Musclehyde's Crane Site, and do severe damage to a Cardbot. Rex Volcano (렉스 볼케이노, Rekseu Bolkeino): Gigantrex generates and fire flaming bolts in succession like a howitzer. Rex Inferno (렉스인페르노, Rekseu Inpereuno): A wide-area skill that is activated by Gigantrex slamming the Rex Arm filled with flame energy into the ground. It burns the surrounding area. A variant includes emitting a fire beam from the Rex Arm jaws. Organizer (오거나이저, Ogeonaijeo): A portal device stored inside Gigantrex's chest. Unlike Red Blitz, Gigantrex is adept to using the device in combat until its over usage caused the device to malfunction and harm Gigantrex until the Metal Cardbots were successful in separating it. It was later repaired after Deep Bite and Rock Crush retrieved it in the third season Metal Cardbot W, but it was ultimately destroyed from an overload before it could finish recharging.

On planet Machina, Gigantrex was captain of the spaceship Speranza and prepared it for a journey to establish a new civilization after being entrusted by Deus Machina to safeguard 2 billion sealed Cardbots onboard the Speranza. He invited his trusted associates Red Blitz, Cielo, and Musclehyde to be his bridge crew and the ship left before the planet's explosion. While the crew was devastated by news of Machina's destruction, Gigantrex revealed he already knew its fate after being warned by Deus Machina and claimed it was inevitable. After the Speranza crashed on Earth due to Red Blitz's misguided attempt to save Machina, its crew became friends with the people of Porcaca Village, especially Mukara, who Gigantrex gifted his Metal Breath and Machinasium spear. Due to a lack of resources, Mukara sealed them and placed stone tablets concealing their Metal Cards in the Porcaca Ruins temple.

Gigantrex is a red Cardbot with a colossal body, black/silver/yellow/white coloration throughout his body, a head resembling the Speranza in shape with a fang-style symbol and booster-based flap on each side, light-blue eyes, a red torso, broad red shoulders with a yellow/white base, black arms with a silver/yellow/red base, red hands, a metal panel on each forearm, matching yellow and black symbols on the chest and forehead, a black back, a black hip with yellow and red portions, silver upper legs with red/black bases and black panels on the outer side, yellow knee extensions with black portions, black lower legs with a red/silver base and silver panels adorn with a red ladder plating along the outer side, and white feet with red and black sections. The tires, mudflaps and suspension on his back can convert into thrusters for an increase in speed. His vehicle form is a semi-bonnet tractor truck with a tanker trailer, which forms Gigantrex's arms and legs. Gigantrex (기간트렉스, Giganteurekseu) is the captain of the spaceship Speranza, leader of a four Metal Cardbot crew, and a brief antagonist in Metal Cardbot S. After crash-landing on Earth 4,000 years in the past, Gigantrex and his crew became friends with the human Mukara and worshiped by Mukara's tribe.

An elite crew led by Gigantrex that was established by selecting top members from his former group to operate his spaceship the Speranza.

Their original mission was an assignment from Deus Machina to pilot the Speranza in search of a new planet to develop as a second home for the Machina people. However, the destruction of the Planet Machina and the unforeseen actions of Red Blitz caused the Speranza to crash land on Earth 4,000 years in the past. The people of Porcaca Village took them in and they formed a deep bond with the human Mukara, entrusting him with their Metal Breath. This friendship continues to shape their values ​​even today. As a symbol of their bond, all four crew members bear the symbol of their friendship on their bodies, representing their four Metal Cards with Mukara in the center. At the time of their arrival, humanity lacked the technology to produce electricity or fuel, the essential energy sources of Metal Cardbots. As a result, the crew members were sealed and kept safe within stone tablets in the Porcaca Ruins temple, awaiting the advancement of human technology to revive them. Now, 4,000 years later, their stone tablets have been stolen from the temple and scattered. Through a series of events, they are finally unsealed in the modern world.

Gigantrex - The captain of the Speranza and the leader of the crew. Red Blitz - Engine Inspector Cielo - Navigator Musclehyde - Pilot

The Speranza (스펠란자, Seupellanja) is a large space-faring exploration vessel from the planet Machina. Equipped with time-travel technology, it was launched to explore the universe through time and space to find a suitable place to establish a new Metal Cardbot civilization. The ship's bridge has stations for its four crew members and its windows are a translucent yellow in the shape of the crest on Gigantrex's forehead and chest. It also has a multi-directional elevator system, an engine room, and wall-mounted card storage for its 2 billion sealed Metal Cardbots. The top of the ship's exterior is armed with automatic turrets and doors that lead to the bridge. After Machina was destroyed, the Speranza ended up on ancient Earth after an attempt to thwart the fate of its crew's homeworld. The vessel was submerged off the shore of Porcaca Village, and its crew ended up sealing themselves in stone tablets under the watch of Mukara as there was no suitable source of energy to sustain them.