The zombie potion's only appearance is in Frollo Beats Up Evil Residents, though it was foreshadowed in Frollo Tries to Get Laid, where Achmed Frollo bribes Yzma and Kronk a million dollars to create it. Hard at work, Yzma and Kronk add every ingredient possible to this difficultly-created potion, such as a copy of The Room, the E.T. the Extra-Terrestrial Atari 2600 game, and slices of Billy Mays (or possibly a duplicate). When the potion is complete, the Arabian Bros fly to France with it in hand, and throw it onto Paris to create the demonic CarnEvil and transform its citizens into brainless zombies.
However, the effects of the zombie potion are negated when Saiyan Frollo tears apart Genie Jafar's insides, flinging blood and guts that cure the zombified citizens and restore Paris to normal. Having used up their last copy of The Room, Yzma and Kronk are unable to create more zombie potions.