Transformers Bumblebee Energon Igniters Nitro Series Bumblebee. Energon is the lifeblood of Transformers robots. Now you too can harness the Transformers energy source with Energon Igniters figures. This Bumblebee Energon Igniters Nitro Series figure transforms between robot and VW Beetle modes in 9 steps. Then plug the Energon Igniters core included in pack into the vehicle and push down to unleash driving action. This Bumblebee figure stands at 7-inches.