Ultraman Powered
This Monster reappeared in the series Ultraman: The Ultimate Hero.
In this series, there are two Red Kings (a female, tan and shorter neck; and a male, red and taller neck) In their debut appearance Red Queen is seen mostly, attacking Chandrah, mostly trying to knock him down by her tail. She tried it a second time and Chandrah chomped on her tip. Red Queen then knocked down Chandrah and she clawed him to death. Pigmon and WINR before facing Ultraman Powered, Ultra Queen calls out to her husband and Red King came with great anger. After being dazed by WINR, Red Queen inexplicably walks to a cliff and slips from the cliff into her corpse while wailing to her husband. Red King went to try and save his wife but Ultraman Powered stopped him, not wanting another life lost while Red King kept calling to his mate, but the cries of Red Queen were not heard. Red King wanted to help, but it was too late; Red Queen had died from her fall from the cliff. Powered urged Red King to not go after Red Queen. Powered took three steps back and Red King fell foward slowly while doing a mournful crying. Red King crawled to the edge of the cliff and roared miserably to his mate one last time. Powered felt sympathy through him, but he couldn't help and flew to the sun, leaving Red King mourning.
Red King reappeared near the end of the show but was quickly killed by their version of Dorako's insta-blades. (It's unknown if this is the same Red King from before or perhaps Red King II.)
Read more about this topic: Red King (Ultra Monster)