Dragon Ball Z: Budokai Tenkaichi 2 - Play as Bardock

Play as Burter:
Defeat Burter in Frieza Saga story mode.

Play as Cell first form:
Defeat him with Piccolo in Android Saga story mode.

Play as Cell Perfect form:
Complete Android Saga story mode.

Play as Cell second form:
Defeat Cell two times in Android Saga story mode.

Play as Cell Junior:
Defeat them with Teen Gohan Super Saiyan 2 in Android Saga story mode.

Play as Dabura:
Defeat Dabura using Gohan Super Saiyan 2 in Majin Buu Saga story mode.

Play as Dr.Gero Android 20:
Defeat him with Krillin Kuririn in Android Saga story mode.

Play as Frieza Final Form:
Defeat Frieza Final Form three times in Frieza Saga story mode.

Play as Frieza Second Form:
Defeat Frieza Second Form in Frieza Saga story mode.

Play as Frieza Third Form:
Defeat Frieza Third Form two times in Frieza Saga story mode.

Play as Ginyu:
Defeat Ginyu in Frieza Saga story mode two times.

Play as Gogeta Super Saiyan 4:
Complete the Shadow Dragon Saga story mode.

Play as Gogeta Super Saiyan:
Complete the Fusion Reborn story mode.

Play as Gohan Great Saiyaman:
Unlock Majin Buu Saga in story mode.

Play as Gohan Super Saiyan 2:
Defeat Dabura using Gohan Super Saiyan 2 in Majin Buu Saga story mode.

Play as Gohan Super Saiyan:
Reach the part where you fight Android 17 and 18 in History Of Trunks story mode.

Play as Goku Super Saiyan 2:
Defeat Majin Vegeta in Majin Buu Saga story mode.

Play as Goku Super Saiyan 3:
Defeat Majin Buu Good in Majin Buu Saga story mode.

Play as Goku Super Saiyan 4:
Reach the part where you fight Yi Shenlong Omega Shenron in Shadow Dragon Saga story mode.

Play as Goku Super Saiyan form:
Reach the part where you fight Frieza Final Form the third time in Frieza Saga story mode.

Play as Goten Super Saiyan:
Unlock Majin Buu Saga in story mode.

Play as Gotenks Super Saiyan and Super Saiyan 3:
Defeat Super Buu with Gotenks Super Saiyan 3 in Majin Buu Saga story mode.

Play as Gotenks:
Defeat Super Buu the first time in Majin Buu Saga story mode.

Play as Guldo:
Defeat Guldo in Frieza Saga story mode.

Play as Jiece:
Defeat Jiece in Frieza Saga story mode two times.

Play as Kaioshin Supreme Kai:
Reach the Part where everyone goes off to fight Majin Buu in Majin Buu Saga story mode.

Play as Kame Sennin Master Roshi:
Defeat Kame Sennin in Saiyan Saga story mode.

Play as Kid Buu:
Complete the Majin Buu Saga story mode.

Play as Kid Goku Great Ape:
Complete Majin Buu Saga story mode.

Play as Kid Goku:
Complete Majin Buu Saga story mode.

Play as Kid Trunks Super Saiyan:
Defeat Vegeta using Trunks Super Saiyan in Majin Buu Saga story mode.

Play as Majin Vegeta:
Defeat Majin Vegeta with Goku in Majin Buu Saga story mode.

Play as Majuub Ubb fused with Majin Buu:
Defeat Baby using Majuub in Baby Saga story mode.

Play as Mr.Satan Hercule:
Defeat Cell Perfect form using him in Android Saga story mode.

Play as Nappa:
Defeat Nappa in Saiyan Saga story mode.

Play as Pan:
Complete all of Dragon Ball Z Stories in Baby Saga story mode.

Play as Pikehan Pikkon:
Defeat him with Goku in Fusion Reborn story mode.

Play as Raditz:
Defeat Raditz in Saiyan Saga story mode.

Play as Recoome:
Defeat Recoome in Frieza Saga story mode.

Play as Super Buu:
Defeat Super Buu three times in Majin Buu Saga story mode.

Play as Super Vegeta Super Saiyan:
Defeat Cell second form using Super Vegeta Super Saiyan in Android Saga story mode.

Play as Tao Pai Pai General Tao:
Complete Saiyan Saga story mode.

Play as Tapion:
Defeat Tapion with Kid Trunks in Wrath Of The Dragon story mode.

Play as Teen Gohan Super Saiyan 2:
Complete Android Saga story mode.

Play as Teen Gohan Super Saiyan:
Defeat Cell with Teen Gohan Super Saiyan in Android Saga story mode.

Play as Trunks Super Saiyan:
Defeat Android 17 and 18 with Gohan and watch the scenario after that in History Of Trunks story mode.

Play as Trunks Ultimate Super Saiyan:
Defeat Cell Perfect form using Trunks Ultimate Super Saiyan in Android Saga story mode.

Play as Trunks without sword Super Saiyan:
Defeat Vegeta using Trunks without sword Super Saiyan in Android Saga story mode.

Play as Ultimate Gohan Gohan Elder Kai unlocked ability:
Reach the part where Ultimate Gohan fights Super Buu in Majin Buu Saga story mode.

Play as Uub:
Complete all of Dragon Ball Z Stories in Baby Saga story mode.

Play as Vegeta Majin Buu Saga Super Saiyan:
Reach the part where you fight Dabura in Majin Buu Saga story mode.

Play as Vegeta Majin Buu Saga:
Reach the part where you fight at the Budokai Tenkaichi in Majin Buu Saga story mode.

Play as Vegeta Normal and Super Saiyan:
Reach the part where Vegeta comes to help Goku in Cooler Returns story mode.

Play as Vegeta Super Saiyan 2:
Defeat Dabura in Majin Buu Saga story mode.

Play as Vegeta Super Saiyan 4:
Reach the part where you fight Yi Shenlong Omega Shenron the third time in Shadow Dragon Saga story mode.

Play as Vegito Super Saiyan:
Defeat Super Buu using him in Majin Buu Saga story mode.

Play as Vegito:
Defeat Super Buu using him in Majin Buu Saga story mode.

Play as Videl Great Saiyaman 2 a.k.a. Great Saiyawoman:
Unlock the Fusion Reborn story mode.

Play as Videl:
Unlock Majin Buu Saga in story mode.

Play as Yajirobe:
Defeat Yajirobe at Kami's Lookout in Saiyan Saga story mode.

Bardock The Father of Goku movie:
As Bardock, unlock the Bardock The Father of Goku Movie in story mode.

Return Of Cooler movie:
As Vegeta Normal and Super Saiyan form, reach the part where Vegeta comes to help Goku.

History Of Trunks movie:
As Adult Gohan Super Saiyan form, reach the part where Gohan fights Android 17 and 18. As Trunks Super Saiyan form, defeat Android 17 and 18 with Gohan and watch the scenario after that.

Fusion list:

Goten and Trunks: Gotenks Fusion
Goku and Vegeta: Gogeta Fusion
Goku and Vegeta: Vegito Potara

Z Item fusion list:
Note: Complete Story mode to get all the necessary Z items.
dawgman1190, Tee and Jack, and kevin meurs.

Android 13 = Computer Hatred
Android 13 Fusion = Android 13 Parts of 14&15
Baby Vegeta = Baby Vegeta Second Form
Bojack = Unsealed Galactic Warrior
Bojack Post Transformation = Bojack Ultimate Transformation
Broly = Son of Paragus Hatred of Goku
Cooler = Frieza's Brother Hatred of Goku
Cooler Final Form = Super Transformation Cooler
Cui = Frieza's Soldier Vegeta's Rival
Frieza Final Form Full Power 100 = Ultimate Transformation Frieza Final Form
Garlic Jr. = Makyo Star Dead Zone
General Tao = Bros. of Crane Hermit Memorial Campaign
Giant Slug = Giant Form Slug
Grandpa Gohan = Master Roshi's Pupil Fox Mask
Great Ape Baby = Artificial Blutz Waves Super Baby 2
Great Ape Bardock = Powerball Bardock
Great Ape Nappa = Powerball Nappa
Great Ape Raditz = Powerball Raditz
Great Ape Turles = Power Ball Turles
Great Ape Vegeta = Powerball Vegeta
Hirudegarn = Hirudegarn's Top Half Hirudegarn's Lower Half
Jacked Garlic Jr. = Garlic Jr. Giant Form
Janemba = Saike Demon People's Bad Energy
Janemba Full Power = Janemba Ultimate Transformation
Kibitoshin = Kibito Supreme Kai
Legenday Super Saiyan Broly = Super Saiyan Broly Breakthrough the Limit
Majin Buu Pure Evil = Human Gunman's Gun Majin Buu
Master's Skills = Miracle Dragon Power
MAX Power Master Roshi = Seriousness Master Roshi
Mecha Frieza = Remodeling Surgery Full Power Frieza
Meta-Cooler = Big Gete Star Cooler
Omega Shenron = Ultimate Dragonball Syn Shenron
Post-Transformation Zarbon = Unsealed Zarbon
Salza = Coolers Soldier Armored Cavalry
Slug = Namekian Mutation
Super Android 13 = Android 13 Parts of 14
Super Android 17 = HFIL Fighter 17 Android 17
Super Baby 1 = Lower Class Saiyan Baby Vegeta
Super Baby 2 = Power From Lower Class Super Baby 1
Super Buu Gohan Absorbed = Absorb Gohan Super Buu
Super Buu Gotenks Absorbed = Absorb Gotenks Super Buu
Super Garlic Jr. = Giant Form Garlic Jr.
Super Perfect Cell = Self Destruction Perfect Cell
Super Saiyan Broly = Broly Super Saiyan
Super Slug = Giant Form Slug
Syn Shenron = Evil Dragon Negative Energy
Turles = Low Level Saiyan Tree of Might
Zangya = Galactic Warrior Flowers Of Evil
Zarbon Post Transformation = Unsealed Zarbon

To get Oozaru Forms, collect power orb fusion Z-items and combine them with the early Saiyan characters.

Easy Dragon Balls:
In Story mode, fight as any character in the Town stage and destroy all the buildings. Eventually you will find a dragon ball. Walk to it and you will automatically get it. When you collect all seven Dragon Balls go to the white dot on the map.

Easy money:
In Dragon Adventure mode, play until you get to the Majin Buu Saga. When you make it to the Two Majin Buus storyline, you will be playing as Fat Buu. During that story, go to the top right area of the map and go to the Mountain Road area. Once there, Yamcha will offer you a contest to see how long you can last. If you either stay alive long enough or if you are strong enough to defeat him, you will be awarded with not only 1,000,000 Zeni, but you will also get Equipment Slots 4 and the Fox Mask fusion capsule. Once done, go back to the scenario selection screen and repeat. Increase Fat Buu's attributes as much as possible to make this easier. It is recommended that you spend some time in the Android Saga scenario and choose the Goku Defeated? story. Then, go to the bottom of the map to the Southern Capital. When you are fighting, destroy the buildings to look for a Dragon Ball. Keep doing this until you find them all then summon Shenron and hope that he has the Kiss From 18 capsule. That will bring up your attributes very quickly.

If you need to buy capsules for your characters early on in the Saiyan Saga or Frieza Saga, replay the event Mysterious Alien Warrior Saiyan Saga 00 to unlock the hidden saga Fateful Brothers. During the events of Fateful Brothers where you play as Radditz, there are several events where you can endlessly attempt the side battles against groups of Saibamen. Each victory will result in a green Z-Item called the Saibamen set, as well as some Zeni and experience for Radditz. The item Saibamen set can be sold at Baba's shop for 150,000 Zeni. Repeat this as many times as desired to purchase Z-Items for your team. Also, purchasing the four Purple Z-Items at the shop is also recommended. Each set of two can be fused into the items Halo and Majin Seal, which allow good and bad characters to use their Blast 2 techniques at half the energy cost. This is a very helpful item during some of the more difficult Sagas. After unlocking the Majin Buu Saga the other tip in this section is much more effective.

Completing Story mode:
To get 100 in Story mode, get a good set of Z items to power-up characters. This will make it easier to defeat the high level characters you find in special battles. Find and complete win by defeat all of the special battles. This will unlock alternate plots.An example of a special battle is the Piccolo vs. Raditz battle. It is the very first battle in story mode.

Finding Dragonballs:
Smash through breakable objects on battle maps and run into the Dragonballs to get them. You must also win the battle.

Tournaments:
Complete the indicated task to unlock the corresponding tournament.

Cell Games: Win three and Four Rounds type tournament at Budokai Tenkaichi the first tournament.

Mr. Money's Tournament: Win Three and Four Rounds type tournament at Cell Games.

Five Rounds Tournament: Win Three and Four Rounds type tournament at Mr. Money's Tournament.

Final Type Tournament: Win Five Rounds type tournament at every tournament.