On his bio page it states that Kiawe got Marowak "Obtained prior to Episode: A Fire Battle! Marowak Shows Up!"
This should be "Captured in episode..." and the episode title should be updated to the English title.
https://www.serebii.net/anime/characters/kiawe.shtml
Also the following episodes do not have their English episode names in the top right, simply saying TBC, despite the names being on the full sun and moon episode list.
https://www.serebii.net/anime/epiguide/sunmoon/1009.shtml
https://www.serebii.net/anime/epiguide/sunmoon/1010.shtml
https://www.serebii.net/anime/epiguide/sunmoon/1011.shtml
This should be "Captured in episode..." and the episode title should be updated to the English title.
https://www.serebii.net/anime/characters/kiawe.shtml
Also the following episodes do not have their English episode names in the top right, simply saying TBC, despite the names being on the full sun and moon episode list.
https://www.serebii.net/anime/epiguide/sunmoon/1009.shtml
https://www.serebii.net/anime/epiguide/sunmoon/1010.shtml
https://www.serebii.net/anime/epiguide/sunmoon/1011.shtml