Ivan Ooze was a tyrant 6,000 years ago, until he was imprisoned in an egg-shaped Hyperlock Chamber by Zordon and a small group of young warriors, who presumably were the precursors to the modern Power Rangers. His hyperlock chamber unearthed by an Angel Grove construction crew, Ivan was released by Lord Zedd after 6,000 years of imprisonment. Apparently, he was most angered by the boredom of his lengthly imprisonment, being forced to miss several disasters throughout Earth's history such as the Black Death and the Spanish Inquisition (as well as the 1981 reunion of the Brady Bunch). Ivan proceeded to demolish the Command Center and fatally injure Zordon and Alpha 5, leaving the Rangers powerless to morph, fight or even call their Zords.
He traveled to the moon, and once there easily deposed both Lord Zedd and Rita Repulsa, trapping them within a snowglobe. Their henchmen Goldar and Mordant swore allegiance to Ivan rather than join Rita and Zedd in captivity. Ivan then began brainwashing the parents of Angel Grove into digging up and repairing his Ecto-Morphicons, large insect-like machines similar to the Rangers' Zords, which he turned loose to rampage in Angel Grove. After this, he told the parents to go and "leap to their doom", but the parents' children, with some help from Bulk and Skull, stopped them.
After the Rangers gained the Great Power, they returned to Angel Grove and battled Ivan's machines with their new Ninja Zords. Using these Zords, they were able to destroy one of the Morphicons, Scorpitron. An enraged Ivan combined with the other Morphicon, Hornitor, and took on the Rangers himself. The battle progressed into outer space, and though Ivan consistently had the upper hand, he was destroyed when the Ninja Megafalconzord kneed him in the groin, which sent him flying into the path of Orion's Comet, which happened to be passing.
- Ivan Ooze became the main villain in Ash's Adventures of Mighty Morphin Power Rangers: The Movie.
- Ivan Ooze will become the main villain in Littlefoot's Adventures of Mighty Morphin Power Rangers: The Movie.
- Ivan Ooze will become the main villain in Team Robot & The Mighty Morphin Power Rangers The Movie.
- Ivan Ooze became Lilo and Stitch's enemy in Lilo & Stitch's Adventures of Mighty Morphin Power Rangers: The Movie.