From the pattern description:

Insectosaurus is inspired by a character from the DreamWorks Animation film Monsters vs. Aliens (2009). Originally a one-inch grub, he was transformed by radiation into a 350-foot monster who attacked Tokyo. He was captured in 1969, and remained in the monsters unit until the events of the film. The crocheted Insectosaurus is smaller in stature, but will rampage into your heart and take up residence.

This pattern is unofficial, and is in no way licensed or endorsed by DreamWorks or Paramount.