The following is the description of each playable race in the game, along with various information to help you make a choice.

Bio Android
Cells, being a creation of Gero, have the same abilities of their Android counterparts. However they have quite a different appearance to them; they possess green skin, a tail, and selected orange spots upon their skin. The tail not only acts as a weapon but also an absorption medium for energy, allowing for their exponential growth in power. Bio Androids gain strength and speed very quickly, but at the expense of powerlevel and endurance. Their fighting skill is below average.
Race Factors--
Power Level = 75%
Strength = 130%
Speed = 130%
Endurance = 75%
Knowledge of Ki = 100%
Melee = 80%
Gravity = 100%
Gain the power of transforming in melee fighting when you are over 500.000 base power level, and level 35 or over. Power up to transform.
Transformations

Form 2: Level 35

Form 3: Level 50
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Buu
Pink skinned and hate filled, the Buu race was created by the evil wizard, Bibidi. These creatures of destruction are hell bent on murdering all in front of them. The bodies of these Buu demons are rubbery and very tough; few have been able to destroy these demons. And even if they do, the Buus often just regenerate, losing only the power they stole from others, providing for a very hard opponent to fight. They are a parasitic race capable of achieving nealy limitless power. As their power comes from absorbing others they have limited skill in training themselves.
Race Factors--
Power Level = 100%
Strength = 115%
Speed = 85%
Endurance = 130%
Knowledge of Ki = 80%
Melee = 80%
Gravity = 70%
Transformations

Use Buu Absorb on any player or monster to attempt to absorb him into your body. Need to be at least level 35.
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Demon
Usually depicted as evil creatures with red skin, not all demons are diabolical. Their own king, Dabura, is known for his sudden change to that of a good alignment. Not much is known about these creatures, except for the fact that they experience rapid growth in their powerlevel while training, and they have a somewhat above average growth of their speed while training. This comes at the expense of their strength and knowledge of ki gains. Demons are skilled at fighting.
Race Factors--
Power Level = 130%
Strength = 75%
Speed = 120%
Endurance = 100%
Knowledge of Ki = 80%
Melee = 115%
Gravity = 100%
Transformations

Form 2: Alignment 400/1000 (Wicked)

Form 3: Level 75, Alignment 100/1000 (Rotten to the Core)
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Half Saiyan
Only existing in Planet Earth, Halfbreeds are the offspring of Saiya-jins and Humans. Although they do not have the same level of skill as their parents, they are a combination of the best characteristics of each race. Half-breeds are above average in all statistics but powerlevel, though they do not excel in any. They gain powerlevel at an average rate. There is rumoured that they sometimes achieve a big powerboost in a short time, but nothing is proven.
Race Factors--
Power Level = 90%
Strength = 90%
Speed = 90%
Endurance = 90%
Knowledge of Ki = 100%
Melee = 90%
Gravity = 100%
Transformations
Gain the power of transforming in melee fighting when you are over 300.000 base power level, and level 35 or over. Power up to transform.

Super Saiyan: 400.000PL

Ascended Saiyan: 500.000PL

Super Saiyan 2: 1.000.000PL

Super Saiyan 3: 2.000.000PL

Mystic: At any point after being able to pull the Z-Sword from the ground. Permanent transformation.
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Human
From the Planet Earth, Humans are a relatively weak race. Albeit that, when they put their minds to it, they can achieve just about anything. Their intelligence is unmatched by just about any other, and they have the greatest ties to technology. Some have even been known to artificially enhance their own bodies to increase their power. Although they are weak, Humans are a very persistent race; often reaching extraordinary power through constant training, often favoring the way of the Ninja. Their strength and resistance to gravity are offset by a slight shortcoming in speed and knowledge of ki. They have average fighting skills
Race Factors--
Power Level = 80%
Strength = 135%
Speed = 80%
Endurance = 100%
Knowledge of Ki = 80%
Melee = 100%
Gravity = 120%
Transformations

Ninja: Level 35

Ninja Master: Level 50
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Android: Level 70, Permanent transformation.

Super Android: Become Android
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Icer
Known as Icers for living in the frigid wasteland that is Planet Icer. These powerful creatures have mostly pale skin, along with several purple spots placed in the most impact prone areas. Their bodies have the unique ability to change, hence their names, to adapt to their own personal powers; as they grow stronger, their bodies evolve. As Icers gain massive power through transformations they lack somewhat in training ability in all statistics.
Race Factors--
Power Level = 65%
Strength = 80%
Speed = 80%
Endurance = 80%
Knowledge of Ki = 100%
Melee = 85%
Gravity = 100%
Transformations
Gain the power of transforming in melee fighting when you are over 500.000 base power level, and level 35 or over. Power up to transform.

Form 2: 300.000PL

Form 3: 750.000PL

Form 4: 1.500.000PL

Form 5: 3.500.000PL
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Namekkian
Spawned from the Grand Elder on the Planet Namek, Namekians are a peaceful race. Although they are not prone to fighting, they do possess great defensive skills. Their green and pink skins not only makes them stand out in the world of the Humans, but also provides elasticity for their body. Namekians' bodies also have a special ability to regenerate at will, often growing back a limb almost instantaneously, and their pure hearts make them very talented at meditation. Namekkians gain powerlevel fastest of all races, equalled only by saiyans. All their other statistics are just above average.
Race Factors--
Power Level = 100%
Strength = 120%
Speed = 120%
Endurance = 120%
Knowledge of Ki = 100%
Melee = 100%
Gravity = 100%
Transformations

Form 2: Fuse with a namekkian NPC after reaching level 35. This is a permanent transformation.

Form 3: Fuse with a namekkian NPC after reaching level 50. This is a permanent transformation.
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Saiyan
Also known as Saiya-jins. Hailing from the once Planet Vegeta, this near extinct race has formidable powers. Saiyans are born with an inate sense of aggression and love of killing. However, some are able to break free of their hate filled molds. All Saiyans are born with a tail. This extra appendage allows them to grow into large ape-like Oozarus when exposed to the full moon. When in that state, they lose control of their bodies and go on wild rampages. When Saiyans reach supernatural levels of power, they may even gain the power of achieving a level called Super Saiyan. Even though this level is extremely rare, some have even far surpassed that. Saiyans have the fastest power level gains of all races, but at a price to their strength, speed, knowledge of ki and gravity resistance. They are very skilled at fighting.
Race Factors--
Power Level = 130%
Strength = 85%
Speed = 85%
Endurance = 85%
Knowledge of Ki = 80%
Melee = 120%
Gravity = 80%
Transformations
Gain the power of transforming in melee fighting when you are over 300.000 base powerlevel, and level 35 or over. Power up to transform.

Super Saiyan: 300.000PL

Ascended Saiyan: 400.000PL

Super Saiyan 2: 800.000PL

Super Saiyan 3: 1.500.000PL

Super Saiyan 4: 2.500.000PL

Super Saiyan 5: 5.000.000PL