Goof: The truck driver Green Lantern rescues from the volcanic lava was first seen with dark hair, but afterward, his hair is gray.
Goof: How is Flash able to run in outer space, let alone be able to breathe?
Goof: How the heck is Black Vulcan able to utilize his electric powers underwater? The moment he dived in, he should have shorted out.
Goof: When Robin is captured, he's encased in a giant cocoon. When he gets his hand free to use the Bat-solvent from his utility belt, he's not wearing his trademark green glove. The instant the cocoon dissolves, the glove instantly reappears.
If the Riddler was at the BatCave, then he should have known it would be close to Wayne Manor and he should have just as easily figured out Batman and Robin's secret identities.
Goof: Technically, the aliens' rock music shouldn't have overpowered the SuperFriends since sound does not travel in space.
Goof: How is heck is Black Vulcan able to utilize his powers underwater? The moment he dived in, he should have completely shorted out.
Goof: Just before Zan takes the form of water when the twins first utilize their powers, his Z-insignia is reversed.
Goof: When Batman is about to use electrical tape in an effort to neutralize the star creature, his chest insignia is briefly inverted. That is, a yellow bat inside a black oval.