Yakon

Yakon is a character from the anime and manga, Dragon Ball Z, who also appears in Dragon Ball GT. He is one of Babidi's minions, trying to free Majin Buu. Yakon's home planet is called Dark Star. 

Yakon is from a land shrouded in darkness, giving him the ability to see in pitch black darkness. He is a monster controlled by Babidi, and is portrayed as one of his strongest followers (and was possibly intended to be placed on level 3 of Babidi's spaceship, as Dabura claims that sending Yakon to level 2 is too drastic an action). He is a voracious monster with an apparently insatiable appetite as he greets the Z Fighters by asking which one he should eat first, despite the fact that he had devoured two messengers Babidi sent him only minutes before. His power level is said to be at 800 Kili (a unit of measurement that is different from power levels displayed on the conventional scouters). As stated by Babidi, this is a level much weaker than Goku's power level of 3,000 Kili (as a Super Saiyan). Yakon sports a large, retractable claw in each of his forearms. According to the Supreme Kai, he is one of the most feared creatures in the universe and is one of the most powerful beings in his quadrant of the universe.

Yakon is one of Babidi's majin minions. He is from a distant corner of the universe which has no light. He fights Goku on the second level of Babidi's spaceship. He can also feed on attacks like the Kamehameha and the Super Saiyan aura. Goku was able to overcome this and beat Yakon by continuing to power up as Super Saiyan and giving Yakon more energy than he could handle, causing Yakon to explode.

Information from:
http://dragonball.wikia.com/