Sparking! Budokai edition! ...

.
Murasaki=worth putting in. Along with the stage in Muscle Tower where he fought Goku. Hopefully that can be made fun.
Nam= Meep! *wants a what-if where Nam trained harder because of T'en beating him so badly, eventually joining the team in the Saiyan-Freeza sagas*... Fun character with diverse attacks (and heck, diverse compared to the rest of the human cast). And I like the depth he got with the little screen time that he had, so as long as they don't pull an English Budokai1Trunks ("I'm Gonna win! Warg!"), he could be a very cool character for Sparking! Trois.
Giran=Well, like everyone's said, we need more than just Nam and Jackie Chun for a good DB arc/k. And there again, he's a pretty diverse character, and his fight with Tamberine was pretty cool... so eh. (You can tell by what filler was missing that Toei took the new Title thing seriously in z).
Chichi='nough said.
Bra=Meh, I don't see her as really doing much (I know Tapion didn't do much, but he at least got to hold a sword...), but eh, she'd need to be included, because... well... because.

. Maybe it'd be evil Bra, since she's the only one that is shown to have anything to contribute?
#8= Please?

:D:D:D. *suddenly remembers that there isn't much of a guage for his power prior to the tenth aniversary special*.
#14 and 15= Sure, because having all of the androids would be nice. I think with some thought they can be written well enough to be more than random henchmen characters, because... well.. I don't think they were supposed to be in the movie (although that's basically what they became).
RedRibbon People = Well, Yeah... they'd be fun to have. Blue fits into the existing engine easily enough, I guess... give him his paralyzer, a rocket launcher and some crazy stuff and there you go. Silver could be a cool character to include... if you work out his style you might be able to make Captain Yellow into an alternate outfit (even though they are rather different characters).
OxKing=Hee hee... just... because. And he has turtle-hermit style.
Rildo=This should be obvious? He is the primary pre-bodysnatcher tail-kicker in GT, after all.
Most environmental interaction of any significance, short of blowing things up and using scenery as weapons occurs in DB, doesn't it? Because hey... cool interactive environments that do more than just explode! (Preferrably with good soundscapes associated with them, something I greatly enjoy about the first Sparking's one-player mode... the sound makes me very happy...).
Meep! That reminds me that DragonBalls make sound when they glow.
Hmm, Babidi's ship as a multi tiered sort of arena. With doors that only open when you get close (so they make sound.

), or when blasted into ANOTHER DIMENTION!
<-- If you die in a dbz game, you shouldn't start from your last checkpoint. You should go to the checkin station and be judged. And if that means that Cell destroys the Earth, well tough luck, you shouldn't have died.