Buzzwole's larval stage is a large, spiky worm that spends the vast majority of its time in the water. It has no wings to speak of, and its legs are nearly nonexistent aside from strange, fuzzy fins and a strong pair of clawed forelegs. Inflatable sacs at the end of its tail allow it to float face-down and collect air through the spiracles on its tail. At this stage, they feed on leaf litter that falls into their ponds, as well as whatever treats the swarm of Buzzwole caretakers brings them.
Throughout its life, Zwiggler will test its strength by climbing out of the water and dragging itself around. By doing so, its forelegs bulk up into muscular arms over time. As it trains, its back legs grow in as well, freeing up its arms to manipulate various objects. Eventually they begin to crawl around the trees and forage for their own food, competing with Kanopi for the best bunches of fruit when they aren't burying their faces in flowers. In safer places, Zwiggler can be seen doing push-ups and curls to bulk up even more. Its liquid-filled muscle sacs expand as they consume more juice and nectar, giving them a yellowish tint distinct from the deep red of the imago.
Once a Zwiggler's muscles reach critical mass, it evolves. Those that have the energy to evolve quickly will do so in the standard instant-transformation method. Most of them curl up and pupate for just a day or two before punching their way out of their chrysalis as a tiny, loud, overconfident Buzzwole. It is now up to the freshly-hatched adult to find a group that will accept it or stake out a territory of its own.