Namekian

Humanized 'Yoshis' from Namek, the name "Namek" is taken from the word namekuji which means "slug" in Japanese. Namekians are able to make their own set of Dragon Balls.

Universe 6
According to Champa, the Namekians of Universe 6 found the Super Dragon Balls and broke off pieces to create their own set of Dragon Balls and suggests that their Universe 7 counterparts did the same when talking about the Super Dragon Balls with Beerus, Whis, Goku, and Vegeta. Thus it is implied that the Namekians in both Universes created Dragon Balls through the use of pieces from the Super Dragon Balls which are spread throughout the Sixth and Seventh Universes.

In Universe 6, a large number of inhabitants of Planet Namek fused with Saonel and Pilina before the Tournament of Power, giving birth to a pair of very powerful Namekians. They were erased when Team Universe 6 lost in the Tournament of Power. They were later revived when the erased universes were restored.

Universe 7
Approximately three-hundred years prior to the beginning of the Dragon Ball series, the earliest Namekians encountered on Earth (King Piccolo and his sons, though not counting Kami) were evil, destructive and caused chaos throughout the Earth until their eventual narrow defeat at the hands of Master Mutaito and his pupils (including Master Roshi and Master Shen).

It is clear that they were a well-known, space-faring race at some point in the not-too-distant past, as most of the Saiyans who came to Earth immediately recognized Piccolo as a Namekian. The Daizenshuu says that they used to trade with other planets, but stopped after the cataclysm. It is also known that Namekians had a vast knowledge of technology, because the Nameless Namekian was spirited away to Earth in a spaceship (with Namekian language voice recognition) prior to the massive climate shift disaster. Also, Lord Slug is an avid space-traveler Namekian.

In the era of the Dragon Ball series, there were just over 100 Namekians alive on their home planet, as they had been killed off a generation before, by a great tempest. The only known survivors are Grand Elder Guru, and the nameless Namekian, who was sent to safety on Earth. Another survivor, Lord Slug, is introduced in the movie Dragon Ball Z: Lord Slug.

In Jaco the Galactic Patrolman, a Namekians is shown to be a member of the Galactic Patrol around the time of the Genocide of the Saiyans though they are implied to be deceased by the time of the Galactic Patrol Prisoner Saga as the sole survivor of Moro's invasion of New Namek Esca notes that he, Dende, and Piccolo are the last surviving Namekians after he is brought to Earth by Jaco. Up until the arrival of Nappa and Vegeta, Piccolo and his mutated brothers were considered demons (monsters in the Funimation dub) due to the evil nature of King Piccolo and his sons.

Kami's status as a Namek was not generally known, though he would not have been considered a demon. Some point after Kami came to Earth, he lost memory of his home-world, and thus, Kami forgot where he originated from, but remembered most of his native language. During the 23rd World Martial Arts Tournament Kami (in the human Hero's body) and Piccolo speak a strange alien language to each other, which is later revealed to be the Namekian language. Upon meeting Piccolo, Raditz strangely does not identify him as being from Namek, however Vegeta and Nappa do.

King Piccolo spawned a number of mutated sons who were considered Namekians due to retroactive continuity. It is possible that King Piccolo's evil caused his own sons (including Cymbal, Drum, Piano, and Tambourine) to be mutated and malformed, so much so that they did not even resemble normal Namekians.

In Age 762, during the Namek Saga, their home-world Planet Namek was terrorized by Vegeta, Frieza, his henchmen: Dodoria and Zarbon, as well as a host of his other soldiers. The planet was ultimately destroyed by Frieza as a last-ditch effort to kill Goku, in their battle during the Frieza Saga. All of the Namekians were temporarily transported to Earth, where they lived for nearly a year before being resettled on New Namek. During the Cell Saga the young Namekian named Dende, is chosen by Goku to be Kami's replacement as a new guardian of the Earth's Dragon Balls on Earth.

In Dragon Ball Online, Namekians fled to Earth in Age 853 after having their home of New Namek attacked by Miira. In Age 940, Dark Namekians begin to spawn eggs on Earth and, in the area which they live, there is an empty throne where King Piccolo's "demon" kanji can be seen. This Demon Clan is composed of evil Namekians, most of them mutated, like it was the case for King Piccolo's Demon Clan, and possibly, Slug's Demon Clan. Earth's conflict with evil Namekians led by Narak begins in Age 972 as their numbers start to grow. The Dark Namekian General Gamelan also seeks to become the God of the Narak with Chocolay Tower acting as his equivalent to The Lookout and Korin Tower, allying himself with Korin's evil counterpart Chocolay and apparently creating Mr. Poko Poko, the Black Mashenlong who serves as a counterpart to Mr. Popo (in name & clothing), Porunga (whom Mr. Poko Poko resembles), and Shenron implying that Gamelan seeks to create a dark mirror of the divine hierarchy of Earth. Additionally Gamelan is shown to have surpassed Piccolo and is strong enough to take on members of the Time Patrol, though he is ultimately defeated and is betrayed by Dark Namekian Elder turned Time Breaker Week who kills him for allowing Chocolay Tower to fall. However Week himself is later defeated by the Time Patrol.

In Dragon Ball Fusions, a Namekian survivor named Fargo is introduced and he is revealed to have been sent off world in a spaceship as a baby (similar to the Nameless Namek) and was found by the Frieza Force who raised him to serve as a Combatant in Frieza's Army causing him to develop a somewhat evil personality, though not as megalomaniacal as King Piccolo or Lord Slug.

In Dragon Ball Z: Kakarot, during the Sub Story "Victimized Namekian" set during the Battle on Planet Namek, Gohan finds some Frieza Force soldiers threatening to take a surviving Namekian Child to interrogate him about the Dragon Balls. Gohan defeats the soldiers and tries to console the child but he tells Gohan to stay away as he suspects Gohan of being a Frieza Force Soldier. Gohan tells him he's not one of them and tries to approach but the child doesn't believe him as he suspects Gohan is evil too due to having come from another planet.

Gohan apologizes for failing to save his village. The child is surprised by Gohan's words and Gohan promises he's there to help. Suddenly Gohan hears the child's stomach growling and asks if he's hungry though the child denies it saying Namekians only need to drink water to survive. Gohan gathers some clean water and brings it back. Despite his suspicions, the child drinks the water. He seems fine at first but starts coughing and holding his stomach. Gohan suggests he eat some fruit but the child says he's never had it before. After Gohan gathers some fruit, he gives him some. Gohan asks what he thinks about the fruit he ate, but the child says it tastes bitter. The child says that though it's bitter, he can eat it and feels a little better now.

Gohan decides to ask Bulma her opinion given she's a scientific genius. After explaining the situation to Bulma she suggests all the recent stress he's gone through might have triggered abnormalities in his head and body, so instead of absorbing nutrients from water, he had to get his nutrients from food. Gohan returns to the child and tells him what Bulma said. However Gohan is confident his body will naturally go back to normal eventually, though the child is unsure.

After collecting more fruit, the child asks Gohan why he's being so kind to him. The pure hearted Gohan simply says it was the right thing to do. The child reveals his name is Necke. Necke says that though things are tough for him right now, knowing there are nice people out there makes what he's going through easier to take. Gohan says he'll do all he can to help and Necke thanks Gohan for his kindness.

Physiology
Antennae and light green skin, pink patches (pale yellow in the original manga) appearing throughout their bodies (also, many Namekians are named after words meaning "slug" or "snail"). Elderly Namekians have darker green skin and less prominent pink patches (these appear to become dull-orange as the Namekian advances in age), pointy ears, and red rings, in which they have three red conjoined rings on their ankles and wrists, making them look like they have ankle bands and wristbands.

Dragon Clan
The Namekian support caste. These Namekians have abilities that pertain to magic. The greatest unique trait of the Dragon Clan is their ability to create objects, and if they reach genius-class they can even create Dragon Balls. Nameks in this class include Guru, Kami, Moori, and Dende.

In Dragon Ball Online Dragon Clan is noted to be the only core class that requires the player to have a weapon (Staff) equipped. This is the core of a Namekian that will branch off to either the supportive Dende Priest or the offensive Poko Priest.

Warrior
The combat caste. These are Namekians who are proficient in combat, and their power levels are usually around the 3,000 range. As stated previously, Nail is by far the most powerful warrior-type Namekian, with a power level of 42,000. Warrior-type Namekians are unable to use some of the magician-like abilities of members of the Dragon Clan, as shown by how when Piccolo merges with Kami and uses his body as the base, the Dragon Balls lose their power and another Dragon Clan member (Dende) is needed to restore it. The Daizenshuu states that the first batch of three Namekians who fought Frieza's men were warrior-types. The anime states that all combat-capable Namekians (including Nail) were of the same caste and that Nail was far more powerful because he was the best of them. In both the anime and manga, Guru states that Nail was the only Namekian born a fighter-type.

In Dragon Ball Online, once reaching the required level of skill, a Warrior-type Namekian may choose to become axe-wielding Shadow Knight or a Dark Warrior which fights equipped with claw weapons.

Demon
With a desire for world domination, King Piccolo gives birth to several Namekians with severely warped characteristics. It is believed that the evil mind and soul of King Piccolo is what changed them into these horrible monsters. At least in the case of Cymbal his Draconic appearance was the result of King Piccolo giving him an appearance that matched his task of finding Dragon Balls. Their output of energy varies, as almost all can do nothing more than a Chou Makouhou, but Tambourine uses several energy attacks, in order to kill all martial artists.

Their appearance continuously varies, as Tambourine had gargoyle features, and there was an unnamed spawn looking like Godzilla. King Piccolo's final spawn, Piccolo Jr., was the only son that looks like a normal Namekian. Tambourine, Piano, Cymbal, and Drum were all killed, though some of his unnamed offspring that had survived the King Piccolo wars where later discovered by Piccolo to have produced mutant offspring of their own which he himself accepted he could not deal with on his own, though after the Namekians settled on Earth, Moori suggested they help him round up these mutants until a decision could be made during which time they were studied by the Dragon Clan who managed to tame them resulting in the development of the Poko Priest class.

Many decades later, a successor to this clan referred to as the Dark Namekians surfaced as a result of Namekian refugees who settled on Earth after the destruction of New Namek settling near one of King Piccolo's old thrones which slowly corrupted them and lead to the birth of the Evil Egg which later hatched in the evil Black Namekian Narak who became their leader along with a hand full of Dark Namekian Elders one of whom became a member of the Time Breakers. Additionally Dark Namekians also utilized mutant Namekians as underlings.

Namekians who fail to discard their evil thoughts will turn into Black Namekians known as Narak.

The pure evil Super Namekian Lord Slug also possessed his own Demon Clan, though he was the only Namekian member. In Dragon Ball Xenoverse 2, it is stated by both Chronoa and Lord Slug himself that Slug was born pure evil indicating that he was born a Demon Clansmen. He also hopes that the Namekian Future Warrior will eventually become corrupted by evil (as he notes they are not pure evil like himself though presumably believes them to have an impure heart) through training and serving under him and even hopes to one day go the Planet Namek so he can create an empire of evil Namekians after seeing the Future Warrior is a capable fighter despite their weak Namekian body (as Slug apparently does not consider them strong enough to be considered a Super Namek when he first starts training them).

Demon Clan Namekians are implied to possess demonic powers and anyone killed by them will have their soul end up in a hellish limbo instead of passing on to Other World, though as shown by Piccolo when he killed Raditz and Goku he lost this status presumably due to his lack of a pure evil heart (as he heart was effectively impure as he possessed good and evil traits by that point) and was no longer the evil Demon King he had once been as their souls passed on to the afterlife which was noted by both Kami and Mr. Popo in conversation.

However in the Garlic Jr. Saga, Piccolo possesses an immunity to the Black Water Mist presumably due to his former Demon Clan status as it turns those effected into vampire-like Demon Clansmen that serve Garlic Jr. and the Spice Boys. Additionally Demon Clansmen of other Demon Clans and/or demonic races can recognize other Demon Clansmen as Wings recognized Piccolo as a Demon Clansmen and even tried to convince him to join Slug's Demon Clan unaware that Piccolo had since rejected his demonic heritage and evil ways, though Piccolo did use it to his advantage to kill Wings when he thought Piccolo was going to accept his offer (showing that Piccolo retained some ruthlessness at least towards those that threaten the lives of Gohan and the rest of Earth's inhabitants).

Though Lord Slug despises sunlight like the rest of his clan he is shown to be unaffected by sunlight in Xenoverse 2 as he can walk helmet-less on Namek despite its three suns. However this makes sense as King Piccolo and Demon Clan offspring are unhindered by the light of Earth's single sun as well. This is likely a result of their Namekian physiology being adapted to a planet with three suns thus they are naturally immune to being weakened by sunlight due to the simple fact of being Namekian. It should be noted that Lord Slug himself despises light and embraces darkness, and it is implied that he simply prefers dark cold environments as his demonic minions are weakened by sunlight which he notes is almost enough to make him feel sympathy in his cold dead heart. Additionally Lord Slug's preference for cold may be due to his Namekian physiology as well as Namekians have a strong tolerance for low temperature environments which is simply compatible with his Clan's practice of Terra-Freezing as it renders worlds both dark and cold.