The voice acting (dubbed) is so bad in this one. I guess because I haven't watched the dub in years, but I played Raging Blast 2 and found everyone alright, in this one they have really stilted dialogue and just sound bad at parts.
The worse offender is definitely Trunks. His voice is really rough, and it cracks me up how he has those weird pauses when he's talking. "This...is the power of a full-blooded Saiyan"? Maybe I'm just too use to the original voices after marathoning it...
One thing I love is how the game has lots of different dialogue depending on who you're using in different missions. Like I'm playing as a Namekian, and people keep confusing him for Piccolo, it's a really nice touch.