When in zbattle gate mode go to saiyan saga and go to krillin vs yamcha, or tien vs chaitzou. When you get started destroy the main building in the middle. If all goes well a dragonball will appear on the big stump. Do this seven times and you'll get them all.
Pure Evil Buu
Fuse Majin Buu (Good) and Wicked Person's Bullet.
Fuse Psyche Ogre and People's Malicousness.
Fuse Frieza's Older Brother and Super Transformation.
Do Frieza saga and fight Dabora as Vegeta and keep breaking all the islands until you find the dragon ball. (keep doing this until you get all 7, sometimes it might not be there. You still have to beat him ).
How To Get Master Roshi
Get all the dragonballs and wish for him. (You can also get Kid Goku, Giant Ape, or Vegeta Giant Ape. ).
When you have any form of Gotenks and/or Gogeta
or Vegeto, pick Gogeta or Vegeto and pick any
form of Gotenks and win. Gogeta or Vegeto will
say "You shouldn't mess with the grown-ups boys."
Fuse Vegito and Super Saiyen
How To Get Super Sayian Super Trunks
Fuse the purple potaras trunks and super sayian.
How To Get General Tao
Collect all seven dragonballs and wish for him.
To get Kid Goku you must collect the 7
dragonballs and wish for him.
Complete 100 Ranking Mode in Ultimate Battle.
Fuse Goku's Fusion and Vegeta's Fusion.
Fuse Broly and Super Saiyan.
Fuse Artificial Brutus Waves and Tuffles.
Fuse Kakarot and Hatred of Sayians.
Fuse Galactic Warriors and Seal Realese.
How To Get Super Sayin Trunks
To get super sayin Trunks go to the android saga.
Then battle mecanical Frieza. Then you unlock
super sayin Trunks.
The Great Ape
To get the great ape you have to collect all 7
Dragon Balls and then wish for the great ape.
Fuse two Purple Potaras (Vegeta and Scouter) to
unlock Evil Vegeta.