From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Hatchiyack (ハッチヒャック, Hatchihyakku) is a robot.
Hatchiyack first appeared as Dr. Lychee's Super Computer, but later materialized into a powerful fighter after he absorbed the pure hatred of Lychee. Afterwards, Hatchiyack appeared to be too powerful for even the Z Warriors to handle. Luckily, after about 15 minutes of a rather one-sided fight, Son Goku learned of Hatchiyack's weakness. Hatchiyack only fired his Revenger Cannon after 15 seconds. Knowing this, Goku and the others began powering up their strongest blasts and fired at the count of 15. This proved to be more than enough to fully destroy Hatchiyack.
Hatchiyack appeared in Dragon Ball Z Gaiden: Saiya-jin Zetsumetsu Keikaku and its remake, Dragon Ball: Plan to Eradicate the Super Saiyans.
Dragon Ball Z: Shin Saiya-jin Zetsumetsu Keikaku: Chikyū Hen and Dragon Ball Z: Shin Saiya-jin Zetsumetsu Keikaku: Uchū Hen had alternate scenarios, and most of those had different transformations.
Increased Size form
In this transformation, Hatchiyack grew in size and his hand was slightly larger than Goku's entire body. He was defeated by Goku, who flew into Hatchiyack's mouth and down into his center, destroying his core with a Kamehameha.
In this form, Hatchiyack multiplied into many illusions. Using a mirror, Goku was able to discover who the real Hatchiyack was and the illusions faded away. Hatchiyack was then easily dispatched by a Kamehameha, perhaps having lost power by creating the multiple illusions similar to the Multi-Form technique.
In this form, Hatchiyack grew slightly and was even stronger than before. He defeated the Z Warriors even quicker, as they were no match for him anymore. He was defeated by Super Saiyan Goku, who threw a Genki Dama at his face.
- Energy Wave Combo – A technique similar to Broly's Eraser Shot Volley where Hatchiyack repeatedly throws energy balls from each hand. (Raging Blast 2)
- Explosive Wave
- Full Power Energy Wave – Hatchiyack fires a green wave of energy from his left hand. (Raging Blast 2)
- Revenger Cannon – Hatchiyack's most powerful technique. It is a green energy blast fired after 15 seconds. (Raging Blast 2)
- Revenger Charge – One of Hatchiyack's supportive techniques. (Raging Blast 2)
- Ultimate Blow
- Hatchiyack is described by Goku as being stronger than Broly. This does not offer many clues at roughly how strong that may be because Broly's battle power as an adult is not clarified.
- Hatchiyack, in his Super Computer form, is very similar to Doctor Gero's Super Computer as they both perpetuate their creator's hatred and continue the fight even after the doctors' death.