Deathball

Deathballs are evil devices in the Masterforce portion of the Generation 1 continuity family.

Mega has balls.

Mega developed a powerful explosive which she (in a fit of whimsy, and probably to please Giga) cast in the shape of golf balls.

Fiction

Masterforce cartoon

Giga tests the Deathballs, by hitting one off a makeshift tee stand on their deserted island. It destroys an observation plane sent to investigate their recently surfaced real estate. Giga appears grim and expressionless, which probably means he's jumping up and down and doing happy somersaults inside.

Pleased with he Deathballs performance, Mega gives them to Hydra and Buster. They equip their plans to either fire Deathballs at high speed, or scatter them in a barrage, and use them in their plan to flush out the recently-awakened Autobot Godmaster Ginrai. Ginrai: God On of Rage!!

From Teletraan I: The Transformers Wiki, a Wikia wiki.