Hatchiyack

Hatchiyack is a machine that was made by a Tuffle scientist named Dr. Raichi. It first appeared as the secret boss of the video game Dragon Ball Z Gaiden: Saiyajin Zetsumetsu Keikaku, and is an antagonist of the OVA Dragon Ball Z: Plan to Eradicate the Saiyans.
Hatchiyack first appeared as a massive supercomputer, designed by Dr. Raichi to amplify the "power of hate" in order to help the Tuffles fight back and defeat the Saiyan menace. Unfortunately for the Tuffles, Dr. Raichi was unable to complete his machine in time to stop the Saiyan advance; instead, he allowed Hatchiyack to absorb the hatred and negative energy of the fallen Tuffles before jettisoning it into space.
Years after the Saiyan-Tuffle war and the Genocide of the Saiyans, the machine revives Dr. Raichi, Frieza, Cooler, Lord Slug and Turles as Ghost Warriors in order to attack the remaining Saiyans that live on Earth. After absorbing the pure hatred of Dr. Raichi's ghost, who was defeated by the Z Fighters on the Dark Planet, the machine materializes itself into a powerful fighter.
Hatchiyack first appeared to be too powerful for the Z Fighters to handle, but after about 15 minutes of a rather one-sided fight, Goku learns of Hatchiyack's weakness. Hatchiyack only fires his Revenger Cannon after 15 seconds, and doing so leaves him completely defenseless. Knowing this, Goku and the others begin powering up their strongest blasts, and fire at the count of 15. And after a brief struggle, this proves to be more than enough to fully destroy Hatchiyack.



Information from:
http://dragonball.wikia.com/
Information picture :
http://tekilazo.deviantart.com/