You can't, because the SSJ5 level hasn't been officially created by Akira Toriyama (the creator of Dragon Ball).
But if you really want to play against a SSJ5 Goku, you can search for a hack of Budokai 3 (NOT Budokai Tenkaichi 3, notice that) named Dragon Ball AF.
HA! I wish...
only 1-4 and gogeta...
Lol ok fail.
Gohan ssj 5 but gohan was first who unlock ssj5 Then goku unlock ssj5
yes
Yes
unfortunately No
If there were a SSJ5 Goku, he would theoretically be able to defeat Super Buu with a single punch.
nope but there is a game called mugen that you have download and put goku ssj5 in it
infinte world and bt3
you can't. ssj5 doesnt exist. its just a fan made character
u can not get gouk ssj5 in dbz budokai tenchikai 3 ...........