Villans

The arrogant, polite speaking, almost unstoppable, lizard looking creature
was the one called Frieza.  The son of King Cold was a worthy opponent for
Goku on the planet Namek.  Frieza, like almost everyone else in the universe,
was searching for the Dragon Balls to wish for immortality.  Frieza was
usually accompanied by his the bone-headed alien named Dodoria, and his right
hand man Zarbon.  Frieza was thought to be killed by Goku, but came back to
earth with his father and Frieza, who was half robotic, where they were both
used as sport by Trunks and easily killed.  Frieza had the ability to
transform many times, drastically raising his power level each
transformation.  Frieza destroyed the planet Vegeta, killing almost all of
the Saiyans.

Picture un-availble Zarbon/Dodoria

The light-blue humanoid that wore the wussy pink clothes, was actually not
that weak.  Zarbon took on Vegeta, and defeated him, then Vegeta came back
and Zarbon showed off his true power and transformed into a shark looking
creature and was killed by Vegeta.  Dodoria is stupid, fat, and looks like a
great big piece of round, spikey, pink putty.  He was also killed by Vegeta.

Ginyuu Force

Capt. Ginyu:  The leader of the pack, very muscular and purple with large
horns.  Capt. Ginyu is tricked into being turned into a frog, then he tricked
Bulma and went into her body, then turned back into a frog, then probably
killed when Namek Exploded.

Recoome: The bone-headed, red haired, idiot who get massively knocked around
by Goku just for fun. Very forgetful. Very muscular,likes to give enemies the
ol' Recoome Boom.

Burter: The huge, blue alien who is pretty tricky. Burter is good friends
with Jeice.  Burter often tricks Recoome with bets and tells Recoome that
Recoome was wrong (Thats how stupid Recoome is) and Burter ends up with the
wages.  Burter is killed by Vegeta when Vegeta hops on his neck, snapping it,
and killing him.

Jeice: The small, orange skinned, silver haired pony-boy who shares special
attacks with Burter and combines attacks to make them stronger.  Jeice has an
odd accent and is about as strong as Burter.

Guldo: This little guy is the smallest of the members of the Ginyu Force, he
is kinda goulish looking.  Guldo is short, fat, green skinned, and has four
eyes.  Guldo has a special ability to freeze time when he holds his breathe.
This Ginyu is killed by Vegeta when Guldo tries to kill Gohan and Krillin,
Vegeta send a beam straight through Guldo's neck, decapitating him.
The Ginyu Force acts a little silly at times, but they can be serious.
Whenever they are introduced to someone else they do a little dance and call
out their names and pose.

Picture un-availble  Radditz

Goku's older brother who comes to earth to see if Goku has done his mission
as a Saiyan when he came to earth.  Radditz takes Gohan captive and tells
Goku to kill atleast 100 earthlings or Gohan dies.  Goku is forced to team up
with Piccolo and they take Radditz head on.  Goku wouldn't normally stand a
chance against Radditz by himself because he gets knocked around pretty bad.
Towards the end of the battle, Goku puts Radditz in a full-nelson and Piccolo
fires the Special Beam Cannon at both of them killing Radditz and Goku.

 

This muscle-headed ally of Vegeta came to earth with Vegeta to get the Dragon
Balls, and Nappa destroyed many of the members of the earth's Special Forces.
 Nappa was killed by Vegeta for ignoring Vegeta's orders and failing to
defeat Goku.

 

Garlic Jr., yet another arrogant character in the series.  Garlic Jr. is seen
in the DBZ movie Deadzone and the Garlic Jr. Saga.  Garlic Jr. comes to
avenge his pure evil father because Kame banished him forever.  Garlic Jr.
has the ability to transform from a half-pint elf, to a giant, muscular,
immortal (literally, he collected the Dragon Balls and wished for it) and
very strong.  Gohan was kidnapped by Garlic Jr. and in the battle against
Garlic Jr., Gohan finds Piccolo, Goku, and Krillin in trouble and knocks
Garlic Jr. into the Deazone he created and banishes Garlic Jr.......
Forever?.... Nah.  In the Garlic Jr. Saga, Garlic Jr. escapes from his own
fate thanks to his home planet of pure evil, The Makio Star.  The Makio Star
regenerates all evil and helped him to escape.  Garlic Jr. had an evil
substance called the Black Water Mist that he uses on everyone on earth, and
turns them into blood sucking villians.  the only people not affected were
Gohan, Piccolo, Krillin, and very few humans.  Take note, Goku is dead right
now, so he's not there to help, even though he could have been a big help.