Throughout the game, any race can get a certain Transformation at an unknown point the time period.
A transformation for Humans. This form (like all forms) are reached through a wish with shenron. It increases speed & strength by about 50% and increases EP by 100%, costing 210 EP every 2 seconds.
A transformation for Nameks. This transformation causes the player to grow to roughly 50 feet tall, and causes the user to have a big increase in strength and defense, but a decrease of speed.
A form for Majins. This transformation causes the user to look kind of like Kid Buu. It only increases defense.