When Zarbor first appears, Lennie Weinrib's voice is sped up, just like Bat-Mite's. But later, the voice is played at normal speed, and it sounds exactly as Weinrib's voice for The Penguin.
Before Zarbor shrinks down the last nuclear plant, a large number of military guards are seen all over it. After Zarbor shrinks the plant, no further mention is made as to what happened to the guards.
Zarbor uses his powers to transport Joker, Penguin, Clayface, and Cat Woman to his base of operations, then he orders them to get rid of Batman and Robin. If Zarbor had the ability to transport these four villains from anywhere they were, why didn't he just do that to Batman and Robin from the beginning and save valuable time?