Cooler The Brother of Frieza

Cooler's appearance in his base form is similar to that of Frieza's Final Form, though Cooler's skin is deep-purple as opposed to the pure white of his brother. Cooler is also much taller than Frieza, being roughly the same height as Goku. Along with this, Cooler has a distinctively more masculine appearance than that of Frieza, being quite muscular. Cooler also sports several armor-like carapaces on his chest, shoulders, shins and head; these are apparently natural given how they too change when he transforms. When he transforms however, his body undergoes great changes as opposed to his base form, his chest and muscle-mass has expanded greatly, to a degree similar to that of Frieza's Second Form. His white carapace also changes, with the breast-plates shoulderpads becoming hoop-like in shape, while the white carapaces on his wrists change drastically, gaining dark-blue sections and procuring blade-like protrusions. Perhaps Cooler's most distinguishing characteristic in this form however is the change in the carapace he has on his head, which in this form completely encases his entire head except for his eyes, his mouth being covered behind something reminiscent of a vizier, four spikes extend from his cranium and there is a large dark-blue section in the middle of his head. 
Cooler's personality is quite similar to that of his younger brother and his father, though with a few noticeable differences. Like Frieza, Cooler handles problems in an intellectual and serious manner. Though unlike his brother, Cooler is less likely to underestimate his opponents, as seen when he acknowledged that Goku was still alive despite taking a direct hit from his attack, and thus ordered his subordinates to search for and kill him. Even when they had demolished a large portion of the surrounding environment with continuous barrages of energy blasts, he did insist that they continued their pursuit. Cooler is also apparently somewhat more positively inclined towards his subordinates than his brother and father, as he has never once been seen abusing, ridiculing them or anything of the sort; and even offer to take on opponents whom outmatch them personally, which likely contributes to their great loyalty to him.  

Despite these things though, Cooler is a ruthless killer, even by his own admission. While he does not appear to relish in the agony and despair of his opponents like his brother does, he is fully capable of attacking children, ambushing enemies from behind, and inflicting great harm upon an already incapacitated opponent.

Upon entering his final form, Cooler displays a personality similar to the one shown by his younger brother in his second form, though not quite as pronounced. Cooler becomes exceedingly more brutal in his efforts to kill Goku. One similarity he has with his brother is that Cooler is completely assured of his own superiority over his opponents, and his ego is also quite pronounced as he denotes himself as the "supreme master of the universe".

Like the rest of his family, Cooler is shown to be involved in the Planet Trade Organization, although he does not appear to work closely with his family. He also leads his own squadron of warriors.

In the year Age 737, while Frieza destroyed Planet Vegeta, the home planet of the Saiyans, a newly-born Kakarot  was being sent to subjugate Earth. Seeing that Goku had escaped the explosion, Cooler's henchmen made plans to shoot the space-pod down. Cooler unexpectedly delayed the order, lamenting that his brother was still far too soft to allow a child's escape and that Frieza's conceit would delay the annihilation of the Saiyan race and jeopardize his family's absolute control over the galaxy (well, that, and also the fact that he had seven planets to conquer/destroy by the end of the day [depending on the version], thus making him too busy to carry out the order anyways). Also, as Goku was only an infant at the time, he didn't believe him to be any sort of immediate threat. 

Roughly twenty-seven years later, Cooler was given word that his brother had been killed by a Saiyan. Initially skeptical, he soon comes to believe it, and heads to Earth to avenge Frieza's death; however, he has no compassion for his brother and only desires to do so to restore his family's honor. Upon arriving, he makes his henchmen encounter a Saiyan, who of course is Goku. He succeeds in mortally wounding him in a shot intended for Gohan, but loses sight of his quarry after Goku is washed down a waterfall. This encounter led Cooler to suspect that the reason why Goku was able to seemingly kill Frieza was because he was a Super Saiyan. Not content to blow up the planet, being too proud and eager to smite the one who injured his family name, Cooler goes to some lengths to have him tracked down.

With his henchmen Doore and Neiz killed by Piccolo and Salza almost defeated by him, Cooler finally enters the battle himself, with Piccolo expressing shock, believing him to be Frieza and saying that he should have been dead. Cooler easily defeats Piccolo, blasting him in the chest multiple times and has Salza go after Gohan. Goku, revived by consuming a Senzu Bean, encounters Cooler, and Cooler demonstrates how much mercy he lacks by dropping Piccolo and then blasting him before Goku could catch him. Goku, enraged, begins his battle with Cooler. Initially, he and Cooler are a fairly even match (too much even for Cooler's tastes), so he honors Goku by showing him his ultimate transformation. He increases dramatically in size, speed, and strength; four horns grow to form a crown atop his head as spikes form on his forearms, and he now sports a face-mask of sorts, hiding all facial features except his eyes, which are now red without pupils.

Cooler now easily overpowers Goku in this form, until at length he grows tired of the fight and feels Frieza had further shamed his family by dying at Goku's hand. As he makes plans to destroy the planet, Goku's rage transcends, transforming him into a Super Saiyan. Off-guard and arrogant, Cooler is batted around easily, and then he realizes how Frieza lost to Goku. He gathers enough energy to form a Supernova (the same large orange sun-like attack attack Frieza used to destroy Planet Vegeta) that he hopes will not only be enough to obliterate the Super Saiyan, but the Earth along with him. However, with a powerful Kamehameha, Goku is able to offset his attack and send Cooler hurling into the Sun (interestingly, when Cooler first notices the sun while being knocked back by Goku's Kamehameha, he considers destroying the sun with the intention of causing the Earth and the surrounding Solar System to freeze in darkness, but stops when he realizes that he is heading right towards it). It was then that Cooler realized that Goku was the Saiyan child he had allowed to escape nearly three decades ago, and that in scolding his brother and not lifting a finger he had been far too soft himself. After this, Cooler incinerates in the fires of the sun.

Battle on New Namek
Cooler's remains float around in space and eventually fuse with the Big Gete Star, a giant machine. The Big Gete Star revives Cooler by finally fusing with his brain, eventually allowing Cooler to take control. Cooler set a course for New Namek, intent on draining the planet and using the Namekians as fuel for the star. Dende, learning of this horrible news, calls to Earth's warriors for help; Goku, Gohan, and Piccolo, as well as Krillin, Master Roshi, Oolong, and Yajirobe, travel to New Namek, ready to assist its people. Upon arriving, they find many robotic beings known later as Cyclopian Guards, as well as the "revived" Cooler now in a wholly metallic and enhanced body (in fact, it was a remote-controlled Meta-Cooler). Stronger than ever, he is able to easily repel Goku even as a Super Saiyan, and had it not been for the unlikely appearance of Vegeta, Goku most likely would have been killed. However, even the two Super Saiyans run into difficulty handling Meta-Cooler; the nano-machines that made up his body would instantly detect and repair any defect, and make it so that defect would no longer hinder the "new-and-improved" version. Only by working together in a joint attack would Meta-Cooler finally be destroyed. However, the Big Gete Star housed not one Cooler, but thousands. Goku and Vegeta, battered and beaten, soon realize they have no chance of beating them all, especially as only a single Meta-Cooler gave them so much trouble.

Goku and Vegeta are soon attacked and are absorbed by the Star itself, where they find the brains behind it all, the actual Cooler; an obscene and grinning head split with one remaining eye, strung up by wires and sheets of metal. All Meta-Coolers seen previously were under remote control, and the machine itself formed Cooler's true body. He plots to drain Goku and Vegeta of all their energy for his own purposes (in the Original Japanese version, he states he plans to use their energy to create an army of Metal Super Saiyans which he would use to takeover the universe), saying "Oh, the exquisite agony!" and laughing maniacally. But their power is too much and begins to overload the capacity of his systems. The Super Saiyans then flood the Big Gete Star with energy, causing it to crumble and his remote-controlled robots to self-destruct, while Cooler starts to lose his hold on the planet. Sickened by such "scum" yet again foiling his plans, Cooler fashions a final body from what's left of his organic self, intending to throttle Goku in wires. Even to this end Cooler believes victory is inevitable, and his arrogance costs him his life as Vegeta shears off one of his mechanical arms with a powerful energy blast, giving Goku time to break out and destroy what's left of his body with a deadly energy ball. With the "brain" gone, the Big Gete Star disintegrates over New Namek, with Vegeta crushing the original chip in his hand, ensuring that Cooler will never come back again. 

Power

Cooler possesses many of the same techniques as his brother, though often noticeably stronger. Very little of his individual techniques differ from that of Frieza. Weekly Jump explains Cooler's lack of lower forms like Frieza had by saying that Cooler can fully control his power in his fourth form, so he does not need to have lower forms that lower his power. It is notable that he possesses a powerful fifth form, his fourth transformation. However, this form was still no match for the power of a Super Saiyan.

Cooler can power up his Supernova attack faster than Frieza can thus making him much more dangerous.

He is able to suppress his ki signature (as he was able to sneak up on Goku and Piccolo without detection, something he couldn't have done otherwise). He also possesses the ability to survive in the vacuum of space and like Frieza has the ability to survive even the most horrifying injuries and still function, as shown in Movie 6, in which all that remains of him is his disembodied head. Like his brother, he becomes a cyborg after his defeat at the hands of Goku, only to be defeated once and for all.

In The Return of Cooler, the Big Gete Star gave Cooler the ability to create metal body duplicates. These metal bodies were incredibly deadly as they had the ability to repair any damage done to them up to a certain point (similar to Cell's regeneration), forcing Goku and Vegeta to blast the Meta-Cooler they were fighting into pieces so small he couldn't repair himself. These repairs also had a much deadlier side effect. When repairing himself, Cooler could also analyze how he was damaged and upgrade himself accordingly. In other words, every time the Meta-Cooler was damaged in any way it could instantly become stronger. Such as the power boost it gained when it repaired itself after Goku's attack. These upgrades would then become standard for every new Meta-Cooler created.

In Cooler's Revenge, it was shown that Cooler was near evenly matched with Goku in his base form. However, one interesting fact is that base Goku (after he received a zenkai during the events of the movie) had become so powerful that Cooler states, after battling him that, Goku is powerful "enough to have defeated Frieza". Cooler then transformed into his Final Form where he far outclassed Goku even when Goku went into Kaio-ken x20, and lost only when Goku transformed into a Super Saiyan who dominated him and blasted him into the sun. However, Cooler was saved and rebuilt by the Big Gete Star after his battle against Goku.After receiving his robotic upgrades, Cooler's power increased dramatically. His robotic form, capable of adapting and improving with the tactical computer of the Big Gete Star, was enough to last a while in a fight against Super Saiyan Goku and allowed him to create an army of robotic duplicates. The sheer number of stronger Metal-Coolers were enough to overwhelm both Goku and Vegeta.
Cooler revealed to Goku before his final transformation that Frieza was always trying to beat him at everything and that he would have killed him sooner had it not been for his father. This implies that Cooler was planning on killing Frieza before his confrontation with Goku, and desired to kill Goku mostly for robbing him of his chance of doing so rather than family matters.
A V-Jump scan officially places Final Form Cooler's power level at 470,000,000. 

• Afterimage – A move he used in Dragon Ball Z: Budokai Tenkaichi 3.
• Arc Blast – Cooler transforms into his final form and releases an Arc(tic) Blast, or a lot of sharp little blasts. It is his Ultimate K.O. in the Nintendo DS game Dragon Ball Z: Supersonic Warriors 2.
• Death Ball – A spark of ki that may grow to the size of a small moon.
  
  • Supernova – In his final form, Cooler has the ability to gather tons of ki in seconds to create the supernova. This was to be Cooler's trump card versus Goku, but his attack is blocked and he is subsequently pushed by the force of it and Goku's Kamehameha into the sun.
• Death Beam – Like most members of the Cold Family, Cooler has the power to use Death Beam, as seen in Dragon Ball Z: Budokai Tenkaichi 3.
  
  • Chaotic Dead End – A variation of the Death Beam used on Piccolo.
• Death Chaser – In final form, Cooler punches the opponent in the stomach, followed by a knee and a back-punch, knocking the opponent to the ground. Then, Cooler kicks the opponent in the stomach. Used against Goku.

• Death Flash – An energy wave Cooler used in his base form after he injured Goku with the Eye Laser when he was aiming for Gohan. He used it to chase Goku after he fell in the river. Cooler also used it in his final form against Super Saiyan Goku, immediately before the Supernova, in Cooler's Revenge. In Dragon Ball Z: Budokai Tenkaichi 3, the move was called Full Power Energy Wave.
• Eye Laser – A small thin beam shot from both eyes.
  
  • Darkness Eye Beam – An attack similar to the Eye Laser but instead of going in a straight line, this attack moves in a horizontal direction. Named in the Budokai Tenkaichi series.
• Fatal Combination – A 3-hit combo rush attack.
• Flight – Like almost all Dragon Ball Z characters, Cooler is able to fly through use of his ki.
• Freeze Storm – A combo move used in Supersonic Warriors 2 where Cooler and Mecha Frieza create a blizzard and fire it at the opponent.
• Ki Blast – The most basic form of energy wave.
• Psychokinesis – A technique Cooler used in Dragon Ball Z: Budokai Tenkaichi 2 and 3.
• Psycho Barrier – A technique he used in Dragon Ball Z: Budokai Tenkaichi 2 and 3.
• Salza Blade – A powerful blade of pure ki which Cooler uses to cut his opponents in Dragon Ball
• Transformation – An extra transformation Cooler learned to go beyond Frieza's. Originally, Cooler merely told Goku that he had one more transformation than Frieza.
• Telekinesis – Cooler can lift or move large objects through the air with his mind.
• Cooler, like his brother, Frieza, is able to survive even the most horrific injury, even decapitation and incineration. He can also survive in space.