April O'Neil and Professor von Zifflin with the meteorite.

Exaporon is an element in the meteorite that has crashed onto Earth 1987 cartoon episode Attack of the 50-Foot Irma. After Shredder steals half of the meteorite, Krang crystallizes it, and uses the exaporon for his enlargement ray.

They attempted to enlarge Shredder above ground, but instead enlarged Irma. Donatello uses the remainder of the exaporon to reverse her condition.

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