Character mistake: Zordon begins to explain to the Rangers about their powers and then their Zords. At one point, he says "You need only to turn to the power of your Dino Zords." However, the subtitles get it wrong and spell it as if he's saying "Dinosaurs" instead of Dino Zords which is what he says. (00:10:38)
Character mistake: As one of Rita's goons is helping her out of her prison, she complains that he made her step in a puddle right outside of her canister. However, they are on the moon, so there is no way there is a puddle she could have stepped in. (00:01:44)
The Trouble with Shellshock - S1-E22
Character mistake: About halfway through the episode, we see Billy, Zack and Kimberly are frozen because of Shell-shock. Towards the end when Jason and Tommy are in the Zords fighting Shell-shock, the Yellow Ranger comes running with the flowers that unfreeze the Rangers and Zords. The Yellow Ranger yells "Jason, Billy, I have the Diandra flower!" She should have yelled Tommy's name instead of Billy since we know Billy is frozen and that Tommy is the one helping Jason fight Shell-shock.
Suggested correction: She doesn't know that. She was sent running after they were frozen.
Two for One - S2-E19
Character mistake: After Tommy and Kimberly are attacked by Pursehead, when they morph, Tommy says "Dragonzord" instead of "Tigerzord".