Muši to kamen to Wooser to (S01E09)

Wooser is kidnapped by an evil organization, which does twisted surgery on him to give him the power of the insects. After gaining the bagworm's inability to move, and the short lifespan of a dragonfly, Wooser becomes the ultimate creature... then dies several days later. Maybe the dragonfly wasn't such a good idea after all. (Crunchyroll)