Who Designed Tobal's Characters?
The credit is not a guest spot. Akira Toriyama, creator of Dragon Ball and character designer of the Dragon Quest series and Square's own Chrono Trigger, is credited as the artist of Tobal No. 1, and the game's full roster, starters, bosses and one secret robot, came from his pen.
It nearly did not happen that way. Director Seiichi Ishii had wanted to work with Toriyama from the start, and the team's first idea was to borrow an existing Toriyama cast rather than commission a new one. The original roster exists because Toriyama himself proposed drawing one.
THE TWO COVERS
Same game, two shelves

HOW IT HAPPENED
An ask, a prototype, an offerTHE ROSTER HE DREW
Eight starters, three bosses, one robotTHE TWO BOXES TELL THE STORY
His art at home, a render abroadYou can see Toriyama's standing in 1996 in the packaging. The Japanese box is his illustration, full stop. The North American box replaces his drawings with a computer rendered Chuji, because, as Ishii noted, Toriyama's style was not yet widely recognized outside Japan and there were plans, abandoned for lack of time, to alter the characters themselves for the overseas version.
Inside the game, none of that caution survived. Every fighter on the select screen, from the robot Hom to the emperor Udan, is Toriyama's work, which makes Tobal No. 1 the only 3D fighting game of its era designed end to end by the most famous manga artist alive.