1.If you mean story mode then there are one or two 'What If's' you haven't done, the three are 'Destined Rivals' 'Beautiful Trechory' or something like that, it involves the Freiza saga, and the last one involves Saiyan saga, I forgot it's name,
2.Your probably missing Kid Goku, Oozaru, and Grandpa Gohan,
3.'Kiss Of 18' Is a capsule that raises all of your abilities (health, Ki, attack etc.) by +4,
4.Tenkaichi (Title) is another capsule that power ups your abilities, I think it's like Kiss of 18, it's been so long since I played the game.
[b]
^Now THOSE, Are Vampires!, Unlike the crappy Twilight!,
Man, Don't mess with Anya o_0 EPIC BATTLE! Poor Stark, He just wants to sleep XDCurrent Obsession: [color=crimson]VAMPIRES!! XD.