The Thunder Rangers are two brothers named Hunter and Blake Bradley from The Thunder Ninja Academy who Lothor turned into an evil red and blue power ranger and sent them to destroy The Wind Rangers. The reason why the wanted to destroy Cam and The Wind Rangers is because Lothor lied that their sensei killed their parents until the ghosts of their mother and father told the truth that it was Lothor who killed them. After they know the truth they continue on their own against the rangers and Lothor. Eventually they forgave the rangers and chose to join forces with them.