Wikipedia:Articles for deletion/WonderKing Online
This reference (included on the page) https://nlab.itmedia.co.jp/games/titles/wonderking.htmllists 14 articles on that site relating to this game. I believe itmedia.co.jp qualifies as an 
— User:Thisisarealusername, 07:47, 7 August 2021 (UTC)
Stance: keep
Cited policy: WP:RS (Wikipedia:Reliable sources)