I'm not sure who if anyone is updating the yugioh plugin, but someone sent me something of an update that has about 4119 cards in it, but it needs a little work. If anyone wants to update and/or maintain the yugioh plugin, let me know. I'm far too busy coding to do it myself, plus I don't know much about the game.
Skye said that he's returned and is updating the yugioh plug in but so far only Pokemon was updated;
I'm not sure how long it'll take him but I don't mind having 2 yugioh plug ins.
I'm still too inexperienced with plugin creation to do something like this, but I'd try to help.