Gregory is a small, flying cricket and King Kai's talkative pet. He holds his master in high regard and always speaks highly of him, but he won't hesitate to insult anyone he doesn't consider superior to him. After Goku successfully caught Bubbles, King Kai summoned Gregory as the next challenge: Goku had to hit Gregory with a heavy hammer.
Much later, Gregory meets his end when Semi-Perfect Cell destroys King Kai's planet.
Source: Dragon Ball Wiki










