Board Thread:Support Requests - Getting Technical/@comment-38737193-20200324171256/@comment-9605025-20200324200017

What Love Robin said.

How the Kiseki Wiki does it is that Template:Infobox character uses Template:Spoiler which, in turn, is just a particular use of Template:Mbox. Template:Mbox uses the dev wiki's version of Module:Mbox as opposed to the version from Fandom Starter Pages which comes as default on wikis for the legacy Fandom platform (so not the newer UCP wikis).