Insta-Monster-Mixture

The Insta-Monster-Mixture formula (Demon Beast Serum in Japanese) is a formula that was created by Escargoon as revealed in the anime episode "The Empty Nest Mess". According to Escargoon, the formula has the ability to turn any creature into a mega-monstrous beast. Escargoon used Imohmushii as a demonstration for his formula, and the formula worked, much to King Dedede's joy, after which he knew that then he could make all the monsters he wanted without having to pay Nightmare Enterprises a cent. The king and his servant snail tried to use the formula to turn DynaBaby into a monster but failed when Kirby led Dyna Blade to them, after which she destroyed the formula with her wing.

Later, in a much later episode, "Waste Management", Crowmon found some liquids and drank them, seeing that they tasted good, though not knowing that the liquids were part of the Insta-Monster-Mixture formula, which changed him into a monster. The effect wore off when he was defeated by the combined efforts of Wing Kirby and Dyna Blade.

Trivia

 * Between the episodes "The Empty Nest Mess" and "Waste Management", it is unknown why King Dedede would rather keep buying monsters from Nightmare Enterprises and wasting money on them more often than use his formula.