This Monster reappeared in the series Ultraman 80 as Revived Red King (meaning this Red King is the original Red King from the original Ultraman).
Red King was revived after being wished back to life by Alien Marjin, a genie-like entity who was imprisoned inside of an old jar until being released by three boys who debated about which monster to revive (Eleking and Woo are referenced too.) Shortly after being revived, Red King rampages in the heart of the city and causing mass destruction. Ultraman 80 shows up and after a relatively short battle, Ultraman 80 destroys Red King with the Saxium Ray.
The PlayStation 2 video game Ultraman: Fighting Evolution 3 has a scenario based on this episode.
Read more about this topic: Red King (Ultra Monster)