Defenders of the Earth (1986)

S1E34 The Carnival of Dr. Kalihari

The Defenders attend Dr. Kalihari's carnival, unaware that he has seized control from the original owners and filled it with accomplices for his profit-driven plot. When his lackluster performers are humiliated, Kalihari seeks revenge by tricking Kshin into using a shrinking potion on the heroes. As they gradually shrink toward disappearance, the Defenders must confront Kalihari, his minions, and everyday objects that now pose a serious threat at just three inches tall. Ultimately, they discover the antidote that restores their size, allowing them to defeat Kalihari's crew and return the carnival to its rightful proprietors.