The Annual Grunthor Egg Hunt is a yearly event that occurs on Planet Sargasso. Although it was never detailed, it most likely involves having a competition to find the most Grunthor eggs, although this could prove to be a challenge. The holiday coincides with the Easter holiday on Planet Earth, meaning it could have originated from there. The Annual Grunthor Egg Hunt was mentioned on the Ratchet & Clank 2010 Calendar.