Meganulons shed their skin to become giant dragonflies known as Meganulas. Meganulas are territorial insects that fly in swarms. The Meganula were very attracted to Godzilla's energy and absorbed it to inject it into a Meganulon, so it could grow into the swarm leader known as Megaguirus. Meganula was based on an actual giant dragonfly that existed in the Creaceous period.