Tenkaichi 3 Fusions and absorptions
All the fusions in the game Dragon Ball Z Budokai Tenkaichi 3 as well as the What-if Fusion Mods created by modders for the game.
So, in DBZ Tenkaichi 3, there are various kinds of fusion : The classic fusions which requires to have 2 particular characters in the same team, the fusions-transformations like for example the Kaiobito fusion (in the game, the developpers changed it into a simple transformation but normally it's a fusion between Kaioshin and Kibito) or the absorption-fusions like for example when Cell absorbs Android 17 or Android 18. In the game, the absorptions-fusions are just regular transformations with a custom animation where the character is seen absorbing others characters during the fight.
DBZ Tenkaichi 3 regular fusions :
The fusions below are the normal fusions in the DBZ BT3 game :
When Goku and Vegeta use the potaras to merge, they become Vegeto. In Dragon Ball Z Budokai Tenkaichi 3, Vegeto is available in base form and transformed into a Super Saiyan. In his transformed state, he calls himself Super Vegeto.
If Goku and Vegeta merge with the dance fusion, they become Gogeta and in Tenkaichi 3, Gogeta exists in two forms : Super Gogeta (Gogeta SSJ) and Gogeta SSJ4. For SSJ4 Gogeta, Goku and Vegeta must fuse while they are both transformed into Super Saiyans 4.
If Son Goten and Kid Trunks merge with the fusion dance, they will become Gotenks. So a thing to note here : Contrary to Goku and Vegeta who can only fuse in base form or when they are SSJ4, Kid Trunks and Songoten can fuse when they are transformed into Super Saiyans. Also Gotenks can transforms into a Super Saiyan and a SSJ3.
The Fusions and absorptions considered by the game as transformations :
If the normal fusions are possible only in Team Battles and if the two characters who can use are in the same team, the fusions and absorptions considered by the game as simple transformations are availables in 1VS1. That doesn't prevent the absorbed character to appear in the special fusion-absorption animation.
Cell absrobs Android 17 and Android 18
During the fight, Imperfect Cell and Semi-Perfect Cell can absorb Android 17 and Android 18.
In Dragon Ball Z, if the Supreme Kai and Kibito merge by removing one of their potaras, they become Kaiobito but in Dragon Ball Z Budokai Tenkaichi 3, Kaiobito is just a simple transformation for Kaioshin and this transformation-fusion doesn't even has a custom animation.
Like for the Kaiobito Transformation-Fusion, Majuub is just a simple transformation for Uub.
Buutenks and Buuhan
Super Buu can transform into Buutenks and Buuhan in the game but Theses forms are simple transformations for Super Buu but performed with a custom animation.
The Super Android 13 Fusion
In DBZ Tenkaichi 3, Android 14 and Android 15 aren't in the game so Super Android 13 is just a transformation for Android 13 but it has a special animation where C-13 is seen integrating C-14 and C-15 components into his body.
Fusion of Pilaf Robots
only the small Pilaf Robot is playable in Dragonball Z Tenkaichi 3 so this fusion is just a transformation but it has a special animation where the others Pilaf Robots are seen merging with the playable Pilaf Robot.
Fusion characters considered as base characters in DBZ BT3 :
Super Android 17
In Tenkaichi 3, Super 17 isn't a fusionned character but a base character (You can't become him during a fight but you just select him from the characters screen).
In DBZ, Super Buu is born when Evil Buu eats the fat Majin Buu but in Tenkaichi 3, you can't eat the Fat Buu with Evil Buu, so Super Buu is just a base character which has to be chosen in the inventory.
The Tenkaichi 3 What-if fusions made by modders :
Goku and Vegeta fusions in Super Saiyans.
Goku and Majin Vegeta fusions.
If Goku and Majin Vegeta merge, they become Majin Gogeta or Majin Vegeto.
Goku SSJ4 and Vegeta SSJ4 merge with the potaras into Vegeto SSJ4
This Vegeto SSJ4 exists in two version : The first video shows Super Saiyan 4 Vegeto with the full gi and the other one shirtless SSJ4 Vegeto (like all SSJ4 characters in Dragon Ball GT).
Fusion Gotenks Super Saiyan 4
Majin Buu and Uub Fusion
In this mod video, the Majuub Transformation has been replaced by the fusion of Buu and Uub with the potaras.
Piccolo and Goku merge with the Potaras
In Dragon Ball Z, Goku and Piccolo teach the fusion dance to Son Goten and Kid Trunks which means they can fuse. In Theses two Tenkaichi 3 mod videos (different version), both character become one with the potaras.
The Super Android 17 Fusion
Hell Fighter 17 and Android 17 merge to form the ultimate Super Android 17.
Raku (or Goditz)
It is the fusion of Raditz and Goku via the Fusion Dance.
If Ultimate Gohan and Vegeta merge with the dance fusion, they become Mystic Gogeta.
Gokhan is the fusion of Goku an Ultimate Gohan with the potaras
The first mod video shows Base form Gokhan and the second video Super Saiyan God Gokhan.
Gotrunks is the fusion of Goku and future Trunks with the potaras.
Vegetrunks (Or Trunkgeta, Trugeta, ...)
This character is born when Trunks and Vegeta merge with the Fusion Dance.
Cellin (Cell absorbs Krillin)
Originally, Cellin is an exclusive character from the game Dragon Ball Z Budokai 1 and he appears when Cell absorbs Krillin. This mod recreates this character in DBZ Tenkaichi 3.
Also, Cell absorbs Yajirobe and gets sick in Dragonball Z Tenkaichi 3
Super Buu absorbs Piccolo
If Buu can be played in this form in Budokai 2 and 3, it isn't the case in the Tenkaichi serie where only Buuhan and Buutenks are availables.
Giru and Freeza's potaras fusion mod in Dragon Ball Z Budokai Tenkaichi 3
Vegeta and King Vegeta merge with the dance Fusion into the Ultimate Vegeta
Bardock and Vegeta merge with the potaras (Dragonball Z Tenkaichi 3 Fusion Mod)
Vegeta and Piccolo merge with the fusion dance into Picceta
This fusion mod is a tribute to the fan made serie Dragon Ball AF.
Piccolo and Vegeta fuse with the potaras