Sentinel Knight

Adam Park - Fictional Character History - Power Rangers Operation Overdrive
... powers disabled by the villain Thrax, the Sentinel Knight summons four former Rangers and one from the future so they can defend the Corona Aurora jewels (restoring Ranger powers to those who previously lost or ... first part, after when he and the other Retro Rangers met the Overdrive Rangers and thanked the Sentinel Knight, Adam mentioned that he knew someone who can restore the Overdrive team's powers after their link to ... of the Retro Rangers (excluding Bridge) chosen by the Sentinel Knight, still remain intact ...

Tyzonn - Artifacts
... To prevent its capture by those of negative interest, the Sentinel Knight scattered the crown's jewels across Earth ... The Sentinel Knight, now fully restored to his original physical form, later appeared with the Corona and used it to revive Mack and transform him into ... sought it out as it was the only weapon cabable of destroying the Sentinel Knight ...