|“||An axe with legs and attitude, Hacks chase Kirby as soon as our hero enters Hack's territory. Destroy or evade him quickly.”|
|— Description • Kirby 64: The Crystal Shards Official Strategy Guide (Prima)|
Hacks look like stone axes with silver stone blades for heads, light brown bodies, light brown feet, no arms, and no eyes.
Hack makes its first and only appearance in this game, first being found on Rock Star. When Hack charges forward, it is best for Kirby to run away. If Kirby manages to dodge the attack, he will get his sharp head stuck in the ground for a few seconds.
Hack’s name comes from the term "hack," which means to cut with a blunt object.
Its Japanese name, セッキ (Sekki), comes from the Japanese word for stone tool, せっき/石器/せっ器 (sekki).
- In the Kirby: Right Back at Ya! episode Monster Management, there is a mini-monster that looks very similar to Hack. The mini-monster is a bit different, as it has arms, yellow feet, and a different blade design. It may still be based off Hack, though.
- If Kirby spits or throws something at a Hack just as he smashes into the ground, the Hack will take no damage.