
Here is a bit of info from Wikipedia:
The amount of playable characters are as follows:Story Mode
This is the main mode of the game. The first level is Immecka, the first planet that Son Goku, Trunks, and Pan visit during their quest to find the elusive Black Star Dragon Balls. Throughout the course of the game, players collect the rest of the Dragon Balls and return to Earth, which has been completely taken over by the Tsufurujin parasite known as "Baby". The final stage takes place on Planet Plant, the Tsufurujin home world, which was wished back to existence using the Black Star Dragon Balls by Baby Vegeta. In the final boss battle, Super Saiyan 4 Goku faces off against a Golden Oozaru Baby Vegeta.
• Kid Gokou (GT)
• Super Saiyan Kid Gokou (GT)
• Super Saiyan 4 Gokou
• Pan
• Trunks (GT)
• Oob
• Piccolo
• Super Saiyan Vegeta (GT)
• Super Bebi Vegeta
Some fun-facts taken from Wikipedia:
Child Goku (with tail) and Golden Oozaru Goku are also playable characters, however they are only playable during the end of the story mode and are not selectable in any of the other modes.
Super Saiyan Trunks was listed as a playable character on Atari's website prior to the game's release. Despite this however, he is not a playable character. The site also mentioned that two villains would be playable, but in the end Super Baby Vegeta is the only playable villain.
Review Scores:Piccolo Mode - A Multiplayer Versus Mode where players play as Piccolo and his body doubles.
• GameRankings - 67.92%
• Metacritic - 69/100
• 1UP.com - B-minus
• GameSpot - 7.6/10
• GameZone - 7.2/10
• Nintendo Power - 5.5/10
• PALGN - 5.5/10
• X-Play - 2/5
Overall, the game didn't do too bad with reviewers as it gained a decent score.
Source: Wikipedia
That's it! Hope to get some feedback whether you liked the game or not.
P.S. Wish there was a rom-hack that someone applied the original Tokunaga GT score as well as giving the game infinite lives or a way to keep playing without that horrendous 'Game Over' screen.