Cool Egg

''"Cool eggs are genetically engineered and originally produced by the Earth Corporation. Branded to accompany the launch of their 'Cool Mail' service it ended up naturally occuring all over planets. Nobody knows what, if anything, hatches from the egg, but since they're still used to redeem 'Cool Points' for extra mail space they remain a popular collectible." - The description found in eng.translation

A Cool Egg is a pickup you can find in Cobalt's Classic Survival, Waves Survival, and Story Modes. In Classic Survival, it could be converted to volts, but in Waves Survival and Story Mode, it is converted to volts upon being picked up. It is dropped by Saberwings.