I was actually thinking of making pretty much the exact same thread but you beat me to it. I made a thread a while back specifically looking for cards that had pikachu hidden in them. www.elitefourum.com/t/looking-for-non-pikachu-cards-that-have-pikachu-in-the-art/24198/1
Some of the pikachus are super hard to notice. Ill post back here if I find any other cards like this, I love the idea.