Retro Rangers

The Retro Rangers were a team of Power Rangers assembled by the Sentinel Knight after the Overdrive Rangers link to the Morphing Grid was severed by Thrax and his evil alliance.

History
After Thrax, son of Rita Repulsa and Lord Zedd, was freed, he recruited all the villains who have been searching for the Jewels of the Corona Aurora — Flurious, Moltor, Kamdor, Miratrix, and the Fearcats Mig and Benglo, to unite with him temporarily. By severing their connection to the Morphing Grid forever, the temporary Evil Alliance destroyed the Rangers' powers, and Andrew Hartford couldn't fix their destroyed morphers. They used their gentically enhanced skills in an attempt to defeat the villains, but fared no better, so the Sentinel Knight recruited five Rangers from the past — Kira Ford, Xander Bly, Adam Park, Bridge Carson, and Tori Hanson, to replace the Overdrive Rangers until their connection to the Morphing Grid was restored.

The villains in Thrax's "Evil Alliance" were angry, because Thrax did not think there would be more Rangers. Meanwhile, Mack Hartford (Red Overdrive Ranger) was searching for information on the Sword Excelsior, which Thrax said was the only thing capable of eliminating the Sentinel Knight. He tried to retrieve the sword, but is confronted by Thrax, who intended on saving the legacy of his family of Evil. He was unable to claim the sword for himself, so he sent a giant monster, Vulturus, into the city to destroy it. The Retro Rangers head him off in the DriveMax Ultrazord and Flash Point Megazord, but were overpowered, and DriveMax Ultrazord loses an arm in the battle.

Meanwhile, Mack convinced the Rangers that they will always be Rangers, powers or not, and they all attempted to free Excelsior from the Warrior-Goddess's hands. The statue cames to life and gaves them the sword, sensing the shared friendship and combined conviction in their hearts. Then, Mack headed to the battlefield, where the Retro Rangers weare about to be destroyed, and used the Sword Excelsior to destroy Vulturus. Meanwhile, Adam reactivated Alpha 6 and teleported him inside the Morphing Grid, where he fixed the severed connection, restoring the Overdrive Rangers' powers. Mack handed Sentinel Knight the Excelsior sword, which gave the Knight a Cyborg form.

Confronting the "Evil Alliance", all 11 Rangers morphed and battle the villains. Adam battled Thrax. Bridge and Mack teamed up to defeat Flurious. Dax, Will and Xander defeated the Fear Cats. Tori and Rose battled Moltor and his Lava Lizards, and Kira and Ronny teamed up against Kamdor and Miratrix. Tyzonn was able to destroy the newly revived Vulturus and Flurious's Chillers. To finish the battle, the Sentinel Knight arrives in his Cyborg form and destroyed Thrax, and then joined the Rangers in defeating the rest of the villains, the villains then retreated.