Such a Cheetah is a quest with a boss called the Cheetah. Defeating this boss will unlock the Cheetah Quest Pet. The quest scroll can be purchased from the Quest shop for 4 gems. Cheetah's HP (600) makes this a medium length quest and its strength multiplier (1.5) makes this an easy quest. Without using Warrior or Mage boss damaging skills, a four-person party can typically finish this quest in between two and three weeks.