Would it not at least be best to suffix it with (PvZ)? It could cause confusion and thinking that it only appears in one game. If the point at hand here is requiring three games, why not instead of the "recurring character" pages, there are diambig pages, to possibly direct people to the page they want?
Hello. I know this is random, but, I noticed your "Treasure Hunt" event you did. How were you able to hide the codes in pages? Wouldn't the edits show up in the Recent Wiki Activity, and people could just see those pages and instantly find the code?
I'm not too sure if that will be the case due to their general size. If they did become a thing, they'd need to be constantly updated, though they could be easily created by copy/pasting and editing previously established QSTs.
I guess the short answer is that it is unlikely, but maybe.