Mecha Name: Mazinkaiser SKL
Pilot Name: Ken Kaido, Ryo Magami
Voice: Kaido (Shintaro Asanuma/Doug Erholtz), Magami (Satoshi Hino/Crispin Freeman)
Who created Kaiser and for what purpose is unknown but judging from the opening of the OVA, Kaido and Magami uncovered it from the ruins of what appeared to be the Photon Power Laboratory. Since then it was used by them and WSO to battle threats, with only Kaido and Magami able to pilot it. Kaiser would be used to fight against even armies of enemies. When in dire circumstances, it would be given the Wing Cross to access full power.
What "SKL" stands for is never revealed in the show. According to the official novel, it stands for "Separated Killing Lord". According to Mazintaisen 21, one of its names during the planning phase is "Slum King Legend".
As revealed in Mazinkaiser SKL Versus Kaido was an inmate in a detention center who regularly beat the other inmates when they picked a fight with him. A scientist from WSO working on the Mazinkaiser SKL picked him out to participate in the experiment to pilot the Kaiser. Kaido disliked the idea of being a guinea pig but the scientist convinced him when she told him that all other applicants failed and nearly committed suicide, including herself. Fascinated by the challenge, Kaido accepted. As Kaido took the controls he could feel the immense power of the Kaiser as it felt like it was tearing him apart. But Kaido hung on and managed to move the Kaiser's limbs, surprising everyone including the scientist. When the test was over, he noticed another man sitting behind him. As he argued with the stranger, the scientist had the Kaiser moved to another area. Before they landed, Kaido got the name of the other man, Ryo Magami. Soon the Kaiser was dropped off at an area full of robots piloted by convicts. The Kaiser tore through them all, with Kaido taking a piece of an enemy robot as a weapon. Soon they join the Skull Force by some unknown event becoming the Death Caprice Squad.
The OVA presents a different backstory where he encountered Magami and they teamed up to become mercenaries with a myriad of titles of their brutal reputation. Afterwards they are recruited by WSO to join Skull Force to pilot the Kaiser.
While most of Magami's past is virtually unknown, it is shown he was once a scientist involved in a project for world domination as revealed in the Mazinkaiser SKL Versus manga. The project however failed and Magami was left to wander the world. In the manga he was recruited to pilot the Kaiser along with Kaido having the constitution and will powerful enough to pilot it. In the anime, he met Kaido and teamed up with to become mercenaries where they gained a brutal reputation and titles until they were recruited to pilot the Kaiser and joining the Skull Force.
The Eternal Soldiers by Loudness
The Legend of Kaiser by Rey
According to the first volume of Mazinkaiser SKL Versus, the power output by the Kaiser is too much for one pilot to handle, which is why two pilots are required. And even then, not just anyone could pilot the Kaiser, the pilots needed a strong body and will or the pilot would go mad and literally tear themselves apart. Among the pilots in WSO, only Kaido and Magami could pilot Kaiser. The controls for Kaido are more traditional with levers and switches while Magami uses motion sensors to control Kaiser. The pilots sit one behind the other with the active pilot's chair rotating into the forward position.
Despite the heavily armored appearance of the Kaiser, it is very quick and agile compared to other Mazinger robots (and most other robots in the franchise for that matter) able to avoid rapid gun fire from several sources at once. Its defensive strength and durability is also powerful enough to survive an onslaught of explosives and warheads. Due to the danger the Kaiser presents, its full abilities are often sealed off and can only be accessed by the Wing Cross from its support robot, Wingle. It is also shown to be able to resist intense heat from a large body of mass.
Ganzanto: A gigantic shark-toothed sword attached to the back. It features two sides, one with a razor sharp blade; and another with spikes that can rip enemies apart. The handle can extend so that it can be used as a polearm. This weapon is used when Kaido controls Kaiser. It can also be used for a combo attack with the Tornado Crusher Punch. It's name literally means 'Fang Slashing Sword'.
Breast Trigger: A pair of hand-guns attached to the chest that Kaiser uses to shoot enemies at mid-range whenever Magami is in control. Magazines come from the arms of the Kaiser to put into the Breast Triggers. Bayonets are also attached to the guns to allow stabbing and slashing. They can be used as hand axes for close combat. The guns can also be combined into a battle axe with a long handle. When in full power, the Breast Triggers can shoot lasers instead of bullets.
Tornado Crusher Punch: The SKL's version of Rocket Punch. Like Mazinkaiser, they are propelled from rockets and its rotating forearms. When in full power, the fists can be controlled after they launch.
Rust Stream: A wind-based attack that shoots a trio of tornadoes that merge into a stream of compressed air filled with corrosive elements.
Thor Hammer Breaker: by using electricity in the clouds, the Kaiser uses the Ganzanto to shoot a huge bolt of lighting at enemies.
Inferno Blaster: SKL's most powerful attack, using the heat sinks on the chest armor to shoot an intense blast of heat energy at an opponent, with enough force to go through the planet.
Inferno Giga Blaster: appeared in the final chapter of the manga, a more enhanced version of the Inferno Blaster.
Dynamic Combination: Mazinger Z turns into its Big Bang Punch form and Mazinkaiser SKL mounts it. The gigantic fist collides with its foe and Mazinkaiser SKL follows up with a Thor Hammer Breaker, knocking the hapless foe into the sky. Mazinger Z turns into its regular form and fires a full-power Koshiryoku Beam, while Mazinkaiser SKL fires off an Inferno Blaster, causing a massive explosion visible from space. At the end, Mazinger Z and Mazinkaiser strike poses while Kouji, Kaido and Magami yell, "We are Hell!"
"Kaido: I'm so going to turn this area into the living hell."
"Magami: Hah. Still thinking like monkey."
"Kaido: Now then. LET'S GOOOOOOOOOOOOOOOOOOOOOOOO!"
"Kaido: Prepare to be torn to bloody shred bitches."
"Magami: I will make your request. Who is about to be turned into the bloody pulp if you don't answer the question in three seconds I'll do it for you."
"Kaido: OH YEAH! SUCK ON THIS! TORNADO CRUSHEEEEEEEEEEEEEEEEERRRRRRRRRRRR!" (Using Tornado Crusher Punch)
"Magami: Hah. It's time to blow them away. Time for part three mode in gunkata style. Now from where you're about to fire?! HUOOOOOOOOOOOOOOOOORGH! Hah. For you it's game over fool." (Using Breast Trigger)
"Kaido: Oh yeah! Time to kick some ass. WURYAAA! I'LL CRUSH YA TO PIECES! HUOAAAAAAAAAAAAARGH! If the god stands in our way he gets sliced."
"Magami: If the demon will do the same he will get the bullet in the head."
"Kaido: We fight that we like to fight."
"Magami: We crush that we like to crush."
"Kaido, Magami: The word just cause is not in our volcabulary! You're OURS!"
"Magami: It's too late to wait us in hell."
"Kaido, Magami: WE ARE THE HELL!" (using Ganzanto)
"Magami: Hah. It's time for a little wind practice! Try this! RUST STREAM!" (Using Rust Stream)
"Kaido: Oh yeah! It's time to get shocked for real. THOR HAMMER BREAKEEEEEEEEEEERRRRRRRRRRRRRRR! YOU WON'T RUUUUUUUUUNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN!" (Using Thor Hammer Breaker)
"Kaido: Magami! Time to finish this."
"Magami: No need to tell me. Time to show them why they picked a wrong persons to fight with. HEOAAAAAAAAAAAAAAAAAAAAARGH! INFERNO BLASTEEEEEEEEEEEEEEEEEEEEEEERRRRRRRRRRRRRRR!" (Using Inferno Blaster)
"Kaido: YIEEEEEEEEEEEEEEHAAAAAAAAAAAAAAAAAAAAAA! Time to rider on RR! AIYAIYAIYAIYAIYAIIIIIIIIIIIIIIIIIIIIIIIIIIIIHAHAHAHAHAAAAAAAAAAAAAAAAAAAAA! Suck on this! The true rumble begins now hahaaaaaaaaaah!"
"Magami: Now, Kaido. Finish them off."
"Kaido: INFERNO GIGA BLASTEEEEEEEEEEEEEEEEERRRRRRRRRRRRRRRRRRRRRRRRRRRRRR! The god will kneel and the devil shall run in fear. (With Kaido) We are the hell!" (Using Inferno Giga Blaster)
"Kaido: YAAAAAAAAHOOOOOOO! Magami! Kabuto! Let's settle the score."
"Magami: Indeed. From this day on the true curtain of true hell will begin."
"Kouji: Leave it to me guys."
"Kouji: Blast off. BIG BANG PUUUUUUUUUUUUUUUUUUUUUUUUUUUNCH! Kaido. Your turn."
"Kaido: HAHAAAAAAAA! NOT BAD, Kabuto! THOR HAMMER BREAKEEEEEEEEEEEERRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR! BOOM BABY!"
"Kouji: HERE IT GOES! PHOTON BEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM!"
"Magami: INFERNO BLASTEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEER!"
"Kaido: GO TO HEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELL!"
"Kouji, Kaido, Magami: WE ARE THE HELL!"
"Kaido: OH YEAH! Time to hunt some badguys and tear them to pieces." (Vs. any villain)
"Kaido: You've picked the wrong time to mess with us, Kiba." (Vs. Chief Kiba)
"Kaido: If the god is my opponent this is perfect for me! So you're going to entertain me or what, Radiguet?!" (Vs. God Radiguet)
"Magami: It looks like the demon and god will know the difference between human and god. And I will show you why, Blood Count Radiguet!" (Vs. God Radiguet)
"Kaido: I'm about to kick that boastful ass of yours, Dyma." (Vs. Dyma Goodwin)
"Kaido: This is perfect for me to do some vampire hunting. You are on my hit list, Dio Brando." (Vs. Dio Brando)
"Magami: Euzeth Gozzo was it?! I think it's time to put you in your place."
"Kaido: Hell yeah! The hell awaits your ass, Euzeth." (Vs. Euzeth Gozzo)
"Kaido: Hahaaaaaah. Time to put ya in yer place, Spirit Emperor. Because your empire is about to turn into the hell itself."
"Magami: Begin to say your prayers, Keisar Ephes." (Vs. Keisar Ephes)
"Kaido: Kicking your ass will be my pleasure, Ryo Asuka. Prepare to join your demon brothers in hell."
"Magami: I suppose the humans killed by you had said to you the same thing. Prepare to be shotdown, Ryo Asuka." (Vs. Ryo Asuka)
"Kaido: Come on, Great General of Darkness. We about to kick your ass in no seconds."
"Magami: You're about to feel the true terror, Mycenaenan scum." (Vs. Great General of Darkness)
"Kaido: We about to send your ass straight into the afterlife, Dr. Hell."
"Magami: The hell awaits you, Dr. Hell." (Vs. Dr. Hell)
"Kaido: Kars. You may have obtained the higher power and is a higher level now. But you know that is meaningless to me."
"Magami: Prepare to be blown into the space." (Vs. Kars)
"Kaido: I shall turn that Utopia of yours into the hell itself."
"Magami: Prepare for true hell, Embryo." (Vs. Embryo)
"Kaido: Time to send your ass back into the infinite darkness from which you crawled from."
"Magami: Eternal darkness waits you, Terumi." (Vs. Terumi)
"Kaido: Play time is already over, The Edel Bernal!"
"Magami: In hell you will never play fool." (Vs. The Edel Bernal)
"Kaido: Time to send your ass into the afterlife, Ultraman Belial."
"Magami: Maybe your son was right about you, Belial. You are way too dangerous to live and I will turn you into the dust." (Vs. Ultraman Belial)
"Kaido: Beowulf. This is where ya get off."
"Magami: Unlike you, Kyosuke is a caring man while you are not. Prepare for a true hell." (Vs. Beowulf)
"Kaido: Magami. Time to kick some Decepticon ass."
"Magami: Prepare to meet your allies in hell, Megatron." (Vs. Megatron)