Promo for Thrax. He is the son of Rita Repulsa and Lord Zedd. My explanation of him was that he was born secretly between Season 3 and Zeo. Once the Machine Empire forced Rita and Zedd to leave the moon, they sent Thrax back in time since it wasn't safe to bring him. The plan was for him to grow up and eventually join his parents in their younger days with his knowledge of the future in order to change the past. This would be so that Zordon would've never discovered the Power Coins. But that was cut short when Thrax fought the Sentinel Knight and was imprisoned in his own dumpster. But thousands of years later he breaks free and is ready to finish what his parents started: Conquer Earth!
Thrax's presence has caused disorder in the entire history of the Power Rangers universe! By sending him back in time, Rita and Zedd unknowingly created an alternate universe similar to the Power Rangers TV Series Universe that we know of. That universe is: The Hexagon Universe!