fan wikis are dumb and stupid, but one of the things that tickles me about the Yugioh Wiki compared to the MSPA Wiki is that any given character's "Biography" section is REALLY in depth, and pretty much captures their entire story involvement and/or backstory without skimping on the details.
the funny part is that they are usually so in-depth that they give us like, specific details of how the card games went, completely bogging down a lot of the actual important plot/character interaction
the most legitimately useful thing about the yugioh wiki is that it has a page for every single card on there, which is useful for gaming and for writing my fanfic. and also taking images from their site to use as links on AO3 for said fanfic