who are the three extra unknown charactors in dragin ball z: budakai tenkaichi 2. and how do i get them?

Question

i have all the other charactors already but there are three new unknown charactors in the game that should be shown in the slot for the question signs and i would like to know how to get them to be revealed on the game

Answer 1

If you are talking about the US version, the hidden characters are goku and oozaru goku and grandpa gohan.
for european version they have piccolo daimaku, pilaf and bardock

Answer 2

i do know that if you have saved data from budukai 3 you get people up there but otherwise just beat the game