Piccolo

Piccolo is the most powerful Namekian in the Universe. He has trained Gohan, Uub, Ura, Ure, Goten, and Trunks. For a full bio, visit http://dragonball.wikia.com/wiki/Piccolo

Techniques and Special Abilites
Special Beam Cannon - A blue, green, and purple attack that drills an opponent on contact. First used by Piccolo to kill Raditz.

Ultra Beam Cannon - A more powerful version of the Special Beam Cannon. Instead of multiple colors, it is just green.

Masenko - An attack Piccolo invented and taught to Gohan. Only used once by him in his fight against Spentus during the Tuffle Saga.

Super Masenko - A more powerful version of Masenko.

Kaioken - Piccolo learns this technique on King Kai's planet, but later improves the ability to fit a Namekian.

Namekian Kaioken - After Piccolo learned this technique on King Kai's planet, he later adapted the Kaioken better for Namekians. This resulted in a deep blue aura when used, and the power increasing dramatically. Used in his fight against Horror Form Rigor.

Spirit Cannon - Attack invented by Piccolo. A red wave fired by both hands using energy from the world. Similar to the Kamehameha.

Light Grenade - Extremely powerful attack invented by Piccolo. The user charges the green ball of ki in their hands and throws, creating a massive explosion. Used by Piccolo against Imperfect Cell and Spentus.

Super Breath Cannon - A powerful green ki blast fired from the mouth.

Kamehameha - Piccolo has mastered this move but rarely uses it. He uses it once in his short fight against Super Galick Alemba.

Regenerate - Namekians have the power to regenerate limbs when they are cut off or destroyed.

Instant Transmission - Goku taught this move to Piccolo during the Cell Saga. He later uses it again to teleport to Bulma's ship to go to Planet Plant at the last second.

Light Blaster - An attack invented by Yamcha that Piccolo uses. The user rapidly fires hundreds of light ki blasts, until the user finally fires an extremely powerful purple energy wave that obliterates the enemy.

Spirit Bomb - Piccolo learns this attack on King Kai's planet though never uses it.

Spirit Grenade - Attack invented by Goku that he is taught by Goku. Only uses it once in his fight against Horror Form Rigor.

Transformations
Great Namek - A transformation he used against Goku in the World Tournament at the end of Dragon Ball. Allows Piccolo to grow at least 25x his usual size and crush his opponent. Used in his fight against Horror Form Rigor.