The Fourth Transformation (第４変身 Dai Yon Henshin) is a super evolution transformation taken on by members of the Frieza Race. This form allows the user to ascend beyond their true forms. It is a fourth Transforming Ability, which increases the user's combat capabilities instead of lessening them. The transformation causes the user's offensive and defensive power to increase.
The users of the Fourth Transformation grow in height, gain four or more horns on their heads, gain a spike on each forearm, gain a white tip on their tails, their eyes turn pure red, and if they choose to they can also have a bio-visor slide over their mouths (which echoes their voice). It also seems like the users can turn the skin around their eyes black. The form also caused bio-gems to grow on their arms and legs and sharp blades to come out of their wrists or ankles at the back. The users' voices are also altered to some degree (for example, Cooler's voice upon accessing this transformed state becomes significantly deeper and more menacing).
Usage and power
This form boosts the user's power greatly, as it allowed Cooler - whose base form was comparable to Goku's - to easily defeat Kaio-ken Goku, however, he was easily beaten by Super Saiyan Goku. A 2004 V-Jump issue places Cooler's power level in this form at 470,000,000.
It is hinted by the Dragon Book that King Cold possess this form, as the book notes that Cold appears to be the type who increases his abilities by transforming.
Cooler uses the form towards the climax of the film Dragon Ball Z: Cooler's Revenge in order to combat Goku. Goku noted that, upon taking this form, Cooler's ki was superior to Frieza's full power during their battle on Namek. As such, the form makes Cooler superior to Goku even when using Kaio-ken, to the point where Cooler can fly straight through a Kamehameha with no visible damage. Once Goku transforms into a Super Saiyan, however, Cooler is put on the defensive, being unable to even budge Goku with a blow to the stomach, Goku then easily overwhelming Cooler with his greater speed and strength. Once Cooler used his ultimate technique, the Supernova, Goku even as a Super Saiyan had to put tremendous effort into countering his attack, but he was ultimately able to overpower Cooler and blast him into the sun. This act, however, left Goku so drained that he afterward could not defend himself against the much weaker Salza, despite Salza's own injuries. Cooler while in the form mentions that he can easily gather his ki and charge his attacks much faster than his brother, implying that the transformation does not affect Cooler's stamina or ki control to a meaningful extent. The FUNimation dub implies that Cooler had recently gained the form (the Japanese version merely had him telling Goku that he had one more transformation than Frieza).
In Super Dragon Ball Heroes, Cooler appears in this form and appears to be able to maintain it for as long as he desires with no adverse effects. His version of the Golden Frieza form also possesses traits of the Fourth Transformation.
Video Game Appearances
In Dragon Ball Z: Shin Budokai - Another Road, Frieza gains this form where he obtains the form in Cooler's arcade mode at some point after the two brothers battle, though he is never actually shown in the state on-screen, he does transform off-screen as referenced by Cooler.
Coolieza uses the form upon his creation in Dragon Ball Fusions, where he has the appearance of Frieza in the fourth transformation, thanks to being a fusion of Frieza and Cooler. In the cutscene prior to the Goku and Final Form Cooler fight in Budokai Tenkaichi 2, it was shown that even merely transforming into the form would result in an earthquake.
The Frieza Race Future Warriors in the Xenoverse series can be customized to look like Super Evolution. The Frieza Race NPC Percel appears in this form. The Frieza Clan Berserker also uses this form when using the Super Class-up.
In Dragon Ball Heroes and Dragon Ball FighterZ, it is shown that Golden Cooler retains traits of Cooler's Fourth Transformation while having the same color as Golden Frieza. In Super Dragon Ball Heroes: World Mission, Great Saiyaman 3 & Beat encounter the SDBH game world Cooler in his Fourth Transformation (known as Final Form) had escaped into Hero Town in the real world. Humorously, Mint and Chamile assume Cooler is just a really good Cooler cosplayer though fortunately, Great Saiyaman 3 confronts him before he can hurt the two innocent bystanders. Cooler recognizes Great Saiyaman 3's strength and attacks putting him on the defensive, though Beat appears and attracts Cooler's attention by mentioning his name causing Cooler to attack him with a Ki Blast which Beat instinctively manages to cancel with his ki while guarding. Cooler then decides to get serious and charges towards Beat forcing Great Saiyaman 3 to intercept Cooler using Rapid Movement, allowing him to get in-between Cooler and Beat. Cooler tries to punch Beat, but is stopped by Great Saiyaman 3's Sword which emits a protective energy field. Great Saiyaman 3 then blasts Cooler away with a Kiai from his palm, before attacking Cooler with Burning Slash the same technique that killed Mecha Frieza in Age 764. However after joining the Dragon Ball Heroes team Beat and his partner Note encounter another version of game world Cooler while investigating an anomaly in the game world's Age 764 that caused Future Trunks to be a no show. Cooler (Final Form) shows up with his Armored Squadron just in time to save his nephew Kuriza and his two subordinates Avo & Kado after Beat & Note manage to kill Mecha Frieza & King Cold who survive long enough for Cooler to admonish them. Cooler (Final Form) and his Armored Squadron face Beat and Note but are defeated, forcing Cooler to transform into his Golden Cooler form, with Kuriza transforming into his True Form, while Avo & Kado fuse into Aka, but they are all defeated & killed by the Dragon Ball Heroes however the pair are left exhausted from all the fighting.
In the Dragon Ball GT live show, Frieza is revealed to have attained a power-up, a transformation above his Final Form. It appears much different from Cooler's fifth form, more closely resembling Frieza's first form with several modifications such as much smaller horns (which are yellow), yellow horns that go along the gem on his head, and horns on his shoulder gems. His body's color also changes: his gems become black, his skin becomes teal, his helmet area turns green, and his armored parts become red and black.
Frieza uses this state alongside Cell's new powered up form in their hunt for Goku, during this time Frieza easily defeats Trunks by simply powering up near him. Frieza believes that he and the powered up Cell would together be strong enough to defeat Goku.