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EI-09 appeared in episode 8 of GaoGaiGar and was an "Airship Robo" created through Pizza's infusion of Zonder Metal into an inaccurate weatherman, fused with a blimp. Created a giant cloud that covered the sun for several days - this cloud was made of Concentrated Oxygen, making a direct attack impossible as the resulting explosion would cause the destruction of Tokyo. Formed a complete Zonder Metal Plant, but was destroyed by GaoGaiGar and the Eraser Head before it could fire its Zonder Spores across the world.
EI-09's Concentrated Oxygen barrier was later used as the second layer of the Contra Fall.