Hatchiyack

Hatchiyack is a machine that was made by a Tuffle scientist named Dr. Raichi. The machine was originally designed to amplify the "power of hate" in order to help the Tuffles fight back and defeat the Saiyan menace. Htchiyack' first appeared as the secret boss of the video game Dragon Ball Z Gaiden: Saiyajin Zetsumetsu Keikaku.

Hatchiyack is an antagonist of the Dragon Ball Z OVA Plan to Eradicate the Saiyans. It first appears as Dr. Raichi's supercomputer, but later materializes into a powerful fighter after absorbing the pure hatred of Dr. Raichi who was defeated in his Ghost Warrior form by the Z Fighters.

Hatchiyack, when activated, appeared to be too powerful for the Z Fighters to handle. Luckily, after about 15 minutes of a rather one-sided fight, Goku learns of Hatchiyack's weakness; Hatchiyack only fired his energy blast 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. This proves to be more than enough to fully destroy Hatchiyack.

Transformations
Hatchiyack's game has different endings and most of those endings have different transformations.

Giant Form
Giant Form Hatchiyack In this transformation, Hatchiyack grows in size and his hand is slightly larger than Goku's entire body. He is defeated by Goku, who flies into Hatchiyack's mouth and into his center, destroying his core with a Kamehameha.

Multiple Form
Multi-Form Hatchiyack In this form, Hatchiyack multiplies into many Hatchiyacks. Using a mirror, Goku is able to discover which is the real Hatchiyack and the illusions fade away. Hatchiyack is then easily dispatched by a Kamehameha attack, perhaps having lost power by creating the illusion-Hatchiyacks, similar to the Multi-Form technique.

Super Form Super Form Hatchiyack In this form, Hatchiyack grows slightly in height and gains both additional armor and a boost in power. His power increase enables him to defeat the Z Fighters even faster than before and ultimately outclass them in every aspect. It is only after a Spirit Bomb thrown directly in his face by Super Saiyan Goku that Hatchiyack is finally defeated.

Video game appearances
Hatchiyack as he appears in Raging Blast 2 Hatchiyack is the final boss in Dragon Ball Z Gaiden: Saiyajin Zetsumetsu Keikaku and Shin Saiyajin Zetsumetsu Keikaku - Uchū-Hen. There is a Hatchiyack card from ''Dragon Ball Heroes. He appeared for the first time as a playable character in Dragon Ball: Raging Blast 2''. Also, every copy of Dragon Ball: Raging Blast 2 includes Dragon Ball: Plan to Eradicate the Super Saiyans, the remake of Plan to Eradicate the Saiyans. This was also the first time, along with Tarble, that both get an English voice actor.

Hatchiyack also appears in Dragon Ball Heroes.