Dragon Ball Transformations and fusions

The transformations and absorptions

The Saiyan transformations

Oozaru (Great Ape)

False Super Saiyan

Super Saiyan

SSJ1 transcended

Super Saiyan 2

Légendaire Super Saiyan

Super Saiyan 3

Golden Oozaru

Super Saiyan 4

Super Saiyan God

Blue Super Saiyan

The Great Ape transformation in Dragon Ball and Dragonball Z. The False Super Saiyan Transformation seen in the Dragonball Movie "Lord Slug". The Super Saiyan Transformation used by Goku against Freeza in Dragonball Z. The Ascended Super Saiyan transformation used by Vegeta against Semi-Perfect Cell in Dragon Ball Z. Gohan is the first saiyan character in Dragon Ball Z who becomes a SSJ2 against Perfect Cell. The Legendary Super Saiyan transformation is a special transformation for Broly in Dragon Ball Z. Goku and Gotenks are the only two characters in Dragon Ball Z who can transform into Super Saiyans 3. In Dragon Ball GT, before turning into Super Saiyans 4, Goku and Vegeta briefly transform into a Golden Great Ape. Baby also has this ability when he possesses Vegeta's body. The Super Saiyan 4 transformation is seen only in Dragon Ball GT and only Goku and Vegeta use it. The Super Saiyan God transformation is a transformation used by Goku in the DBZ Movie "Battle of Gods". In the Dragonball movie "The Revival of Freeza", Vegeta and Goku have a new transformation where they become Become blue Super Saiyans.

All saiyans can transform into Oozarus (Great Apes) when they look directly at the full moon.

The false Super Saiyan transformation is used only by Goku when he fights Slug in the "Lord Slug" Movie.

The Super Saiyan transformation is used by Goku, Vegeta, Bardock, Gohan, Goten, Trunks and Broly.

The transcended Super Saiyan transformation is achieved by Vegeta and Future Trunks in the Cell saga. It is an intermediate transformation between the SSJ1 and the SSJ2 state.

As for the SSJ2 transformation, it is achieved first by Gohan during the Cell Sage and then by Goku and Vegeta.

The Legendary Super Saiyan form comes next and it is only achieved by Broly. This transformation is superior to the SSJ2 transformation since in the movie "Broly the Second Coming", LSSJ Broly defeats SSJ2 Gohan before SSJ2 Goku, SSJ2 Gohan and SSJ1 Songoten defeat Broly with a combined Beam Attack.

In the Dragonball manga and anime serie, only Goku can transform into a SSJ3.

Then, in Dragon Ball GT, both Goku and Vegeta transform into Super Saiyan 4s. For Vegeta, he managed to become a Super Saiyan 4 with Bulma's help while Goku can transform freely into this form.

And next comes the Super Saiyan God form which is a special transformation which requires the power of 6 pure-hearted saiyans.

And finally, the blue super saiyan transformation which is how look saiyans characters when they have god ki. This new transformation is seen in the DBZ Movie "The Revival of Freeza".

The Frost Demon transformations

2nd form King Cold

3rd Form Freeza

Final Form Freeza

Freeza 100%

5th Form Coola

5th form Freeza

Golden Freeza

Frost Demons from Dragon Ball Z looks like King Cold and Freeza when they are transformed in their 2nd form. Freeza transforms into his 3rd form when he fights Piccolo on Namek in Dragonball Z. Freeza fights in his final form against Goku in Dragon Ball Z. When he is transformed into his final form, Freeza can increases his power to 100% which also increase the size of his muscles. Coolar has one more transformation than his brother Freeza like it is shown in the DBZ movie "Cooler's Revenge".

Cell's absorptions and transformations in Dragon Ball Z

Semi-Perfect Cell

Perfect Cell

Super Perfect Cell

Cellin (Cell+Krillin)

Imperfect Cell transforms into Semi-Perfect Cell after having absorbed Android 17 in Dragonball Z. After having absorbed Android 18, Semi-Perfect Cell transforms into Perfect Cell. Having saiyans cells, Perfect Cell transformed into Super Perfect Cell after having been nearly annihilated. In the game Dragon Ball Z Budokai 1, there is a What-if Mission when Cell absorbs Krillin and becomes an unusual character named Cellin.

Buu's absorptions

Buu (Southern Kaioshin absorbed)

Buu (Pure Evil)

Super Buu

Super Buu (Piccolo absorbed)

Super Buu (Gotenks absorbed)

Super Buu (Gohan absorbed)

Buu (Original form)

Fat Majin Buu is the result of Majin Buu having eaten the Southern Kaioshin. Evil Buu is a character born from Fat Buu's anger after a villain hurted his Dog and Mr Satan. The Super Buu transformation is the result of Evil Buu having eaten Fat Majin Buu. The Buucolo transformation in DBZ. The Buutenks transformation is when Super Buu absorbs Gotenks in Dragon Ball Z. The Buuhan transformation is what happened when Super Buu absorbed Ultimate Gohan. After having expelled all absorbed characters from his body, Majin Buu transformed into his original form.

Baby's transformations and bodies' possessions in Dragon Ball GT

Baby is a parasite life form the anime Dragon Ball GT. He possessed Vegeta and others saiyans characters but in the serie is main host was Vegeta :

Baby Vegeta

Super
Baby 1

Super
Baby 2

Baby Golden Oozaru

Baby (Original form)

Vegeta possessed by Baby in Dragon Ball GT. Baby in Vegeta's body can transform into a Super Saiyan in DBGT. Baby Vegeta can also transform into Super Baby 2 in Dragon Ball GT. The Golden Great Ape form is the last form that Baby took before being defeated by Goku SSJ4 in Dragon Ball GT. This is Baby's original form in Dragonball GT.

Ginyu's Body Exchanges in Dragon Ball Z

With his special ability, Ginyu can swith his body with his opponent like he successfully did in the Namek Saga with Goku and tried to do with Vegeta later in the story arc : 

Ginyu in Goku's body

In the Namek Saga in Dragon Ball Z, Captain Ginyu exchanges his body with Goku.

Others transformations in Dragon Ball

Giant Namekian

Super Garlic
Junior

Bojack
Transformed

Master Roshi's Super Form

Omega Shenron

Super Janemba

Monster Zarbon

Final Form Hirudegarn

The Namekians characters such as Lord Slug or King Piccolo can transform into Giant Namekians. The Super Garlic Jr Transformation is used by Garlic Junior to increase his power (it also increases his size a lots). Like the saiyans, the space mercenaries led by Bojack can transform into a super form which increase their power. Master Roshi's can transform into his 100% form to launch attacks like the original Kamehameha. When Syn Shenron absorbed the 7 blue Dragon Balls in Dragon Ball GT, he transformed into Omega Shenron. The fat Janemba transforms into Super Janemba in the DBZ movie "Fusions". Frieza's right-hand man Zarbon can transform into a monster to increase his power in Dragon Ball Z. The giant demon Hildegan has a transformation as it is shown in the DBZ movie "History of Tapion".

The Dragon Ball Fusions

Here are all the fusions found in Dragon Ball, DBZ and DBGT as well as the What-If fusions found in derived fan-made works such as Dragon Ball AF or created specially for some Dragonball Z video games such as Dragon Ball Z Budokai 2 :

Majuub

Piccolo and Nail fusion

Piccolo and Kami fusion

Vegeto

Super Vegeto

Super Gogeta

Gogeta SSJ4

Gotenks

Gotenks SSJ1

Gotenks SSJ3

When Uub and the Fat Majin Buu united their force, they became Majuub in Dragon Ball GT. Pïccolo and Nail became one during the Namek Saga which made them able to equal 2nd Form Freeza. At first, Piccolo and Kami where the same character and after they became one again, they became able to surpass Imperfect Cell. When Goku and Vegeta used the potaras to merge against Buuhan, the became Vegeto. Vegeto transforms into a Super Saiyan VS Buuhan in Dragon Ball Z. Gogeta is the character born from Goku and Vegeta's fusion dance in the Dragonball Z Movie "Fusions". When SSJ4 Goku and SSJ4 Vegeta performed the fusion dance in Dragon Ball GT against Omega Shenron, they became SSJ4 Gogeta. When Kid Trunks and Son Goten used the fusion dance against Super Buu, the became Gotenks. Gotenks can transform into a Super Saiyan. To escape the Time Chamber, Gotenks transformed into a Super Saiyan 3.

Gotenks SSJ4

Kaiobito

Old Kaioshin

Pilaf Robots Fusion

Metal Coola

Super 17

Gokule

Goku+Dende fusion

Tiencha

Super Android 13

Gotenks Super Saiyan 4.
Kaiobito is the potaras fusion of Kaioshin and Kibito in Dragonball Z. The Old Kaioshin is in fact the fusion of a Kaioshin and a witch. The Pilaf Robots from Dragonball can fusion. After having been absord by the Big Gete Star, Cooler became Metal Cooler. Super 17 is the fusion of Android 17 and Hell Fighter 17 in Dragon Ball GT. If Goku and Mr Satan merge with the potaras, they will become Gokule. Here is what happens if Goku and Dende merge with the potaras. Tiensha is a what-if fusion seen in the game Dragon Ball Z Budokai 2. After C-13 absrorbed C-14 and C-15, he became Super Android 13.

Aka

Vegeto SSJ4

Ultimate Vegeta

Vegedock

Picceta

SSJ Picceta

Vegeccolo

Gotrunks

Vegeto SSJ God

Gogeta SSJ3

Aka is a special fusion seen in the movie "Songoku and his Friends return" where Tarble, Vegeta's brother, makes his appearance. Vegeto Super Saiyan 4. The Ultimate Vegeta is the fusion between Vegeta and his father King Vegeta. Vegedock is the fusion of Bardock and Vegeta with the potaras. Picceta is the fusion of Piccolo and Vegeta with the fusion dance in Dragon Ball AF. The fused character Picceta from Dragon Ball AF can transform into a Super Saiyan. If Piccolo and Vegeta merge with the potaras, they become Vegeccolo. Gotrunks is the fusion of Trunks and Goku with the potaras. Vegeto transforms into a Super Saiyan God. Gogeta SSJ3.

Gokhan SSJ God

Bargeta

Omega Buu

Fat Buu and King Kai Fusion

Shenron Z Warrior

Trunten

Nuovis Shenron

Goccolo

Gokhan Super Saiyan God. What-if Bardock and Vegeta merge with the fusion dance in Dragon Ball Z What if Omega Shenron and Buuhan merge with the Potaras in Dragon Ball Z. What would happen if Fat Buu and the Northern Kaio would merge with the Potaras. Shenron Z Warriorr, also called Shenron Manifested, is the fusion of Omega Shenron and the Dragon Shenlong.Trunten is the fusion of Songoten and Kid Trunks with the potaras.Nuovis Shenron is the fusion of Nuova Shenron and Ice Shenron with the fusion dance.Goccolo is the fusion of Piccolo and Gohan with the potaras.