Shade Rangers

The Shade Rangers were evil copies of the Gaorangers. Dorodoro used his ninja powers to create shadow-clones of the Gaorangers, whom they could not destroy without killing themselves in the process. After GaoRed used his Falcon Summoner to kill Dorodoro, the Shaderangers then disappeared.

Trivia

 * The Copy Sentai Copyranger were previous copies of the Gaorangers.