Frieza

Frieza's has 4 forms in which once he takes those forms his entire body changes and there is no going back. Once that form is taken it will be his permanent body.

Form 1
Small Alien being about 3 foot tall and rides around in a hover chair. Kills Nail in this Form.

Form 2
The same shape and look of Form 1 but much bigger. He resembles his father King Cold. His Powerlevel reaches 1,000,000 in this form. Impales Krillin on his large horns. Fights Piccolo in this Form.

Form 3
This is an odd form he looks like something out of Alien the movie. He is smaller with a long banana shaped head. He is not in this form long before going to the next level.

Form 4
Much more sleek body looks kind of like his first form he is now about 4 feet tall and very powerful. He has to change to this form to fight Goku. His Perfect Form is when he raises his powerlevel in this form and his body bulks up and he gets about a foot taller. He has to go into ultimate form to fight SSJ Goku.

Cyborg Frieza
After Frieza is Defeated his remains are found by King Cold and he is rebuilt using cybergenic parts. This applifies his power but he is in the regular form 4 body with obvious electronic modifications. This Form and Freiza are Destroyed by Trunks.

Zarbon

Zarbon is one of Frieza's right hand henchmen. He is teamed up with Dudoria when Frieza leaves the ship. He has two forms that are transferable, once he changed form he can change back.

Form 1
He is a handsome tall green man that protects Frieza. He fights Vegeta in this form.

Form 2
He is a big ugly hulking beast. He is forced to take this form to fight Vegeta because Vegeta is so strong. Killed by Vegeta

Saiya-Jin's

Saiyan's a changable race. They Forms galore. From a huge beast to long golden hair with no eyebrows. This is obviously the Universe's Stongest race. All forms are completely reversable

Oozaru
Saiya-Jin's are born with a tail that gives them a certain power. When a Saiyan looks and feels the energy from the full moon light. They change into a 40 foot tall snarling beast that looks in between a werewolf and huge Monkey. This makes their powerlevel 10x stronger. The only way to change back is be rendered unconscious or have your tail cut off.

Super Saiya-Jin
This was only to be rumored of happening until Goku went through it for the first time. When a Saiyan goes through a strong emotional situation their body can evolve to assess the situation. Once this is achieved the Saiyan can again achieve this level and control it. It can be recognized by Standing up Gold Hair and Green eyes. This grants the Saiyan unfathomable new power. Achieved by Goku,Trunks,Vegeta,Gohan,Chibi Trunks,Brolli and Goten

Super Saiya-Jin Level 2
This is a higher level of Super Saiya-Jin. When a Saiyan is ready and has enough emotional stress to push them this far a Saiyan achieves an even more powerful level of evolution. This can be seen by the hair becoming a platnium blonde. The hair stands on straight end and hair grows a little bit longer. The Saiyan becomes once again much stronger with the same green eyes. Muscle Tone changes just a little. Achieved by Gohan,Goku, and Vegeta

Super Saiya-Jin Level 3
This is a different evolution. When the Saiyan is strong enough and completely ready and has enough anger and emotional stress a Saiyan evolves once again. This time the Golden hair grows down to the knees. The eyebrows dissapear and the muscle tone becomes larger. Achieved by Goku, and Gotenks

Golden Oozaru
This is just like the Oozaru form. About 40 feet tall the only difference is the hair on the body is Golden like that of a Super Saiya-Jin. It is the combination of a Super Saiya-Jin and Saiyan Oozaru form. This is a great power and can be extremely dangerous if control is lost. Saiyan does need a tail for this to work or he must have a nifty machine Bulma built.

Super Saiya-jin Level 4
An ultimate evolution. Not really a level but a form only the true Saiyan Warriors can achieve. The body becomes covered in fur as in Oozaru. Hair becomes very bushy. If the tail is removed it grows back. Muscle tone becomes larger. This is an the ultimate Saiyan Form it has only been achieved by Goku and Vegeta, the greatest warriors of all Saiya-Jin's.

Cell

This is Dr. Gero's final great creation. Cell is a being composed of all the Z fighters cells to create a being able to defeat every warrior on earth. He was made to only reach full power after he has absorbed Dr. Gero's previous great inventions, Android's 17 and 18.

Form 1(Cell)
He is a strange looking creature with a type of beak for a mouth and a long tail. He gets his power by absorbing people through his tail. After he gets to full power by absorbing he tries to evolve to the next form by absorbing Android 17.

Form 2(Imprefect Cell)
This form is achieved by absorbing Android 17. He is a lot taller and has a lot more muscle definition and more of a humaniod shapedd face. This is still not is ultimate form so it is still weak. He must absorb Android 18 to become is ultimate form. He ends up talkig Vegeta into letting him find Android 18.

Form 3(Perfect Cell)
This is his Ultimate form after he absorbs Android 18. This is a very powerful form with quick reflexes and unlimited energy. His tail almost dissapears and his face looks very humanoid now. He has large wings. And a very cool voice. This Form and Cell is defeated by Super Saiya-Jin 2 Gohan.

Buu

Ok I dont want to list these until I see them cause I dont want them to be out of order or wrong in any way. Keep checking back as each form is shown I will list it right here. Thanx