 Planet Onyx is featured in this series as well as the tavern whom  are last seen in "Power Rangers: In Space." Monsters from past  series have been seen here like in the last series as well as  previous monsters seen in this series. In "Heir to the Throne,"  Rhinoblaster, Fearog, Waspicable, a Barillian Bug, Termitus,  Destructoid, Soccadillo, Beetleborgs Ultra Vulture and Stego Dreg,  and Masked Riders Maggot were seen at the Onyx Tavern. In "Protect  the Quaser Saber", Oysterizer, Flamite, Marvo the Meanie, Sinister  Simian, two Pirahnatrons, Soccadillo, Termitus, Crocotox Red, the  Shark Brothers, the unnamed Blue Beetle monster, the as