Cripes! There's a Chibi Maruko-chan opening by Masaaki Yuasa that I'd never seen before. It's the most amazing one, too. The round drops and the style of coloring/shading are strongly reminiscent of Cat Soup, so it must have been one of the last if not the last one he did. I still haven't been able to find the original opening and ending, though, which have massive nostalgia value to me, since I remember watching the show when it first came out and remember that a lot of why I loved the show so much was for that crazy opening and ending. The opening has Maruko flying through the air in one continuous sequence on this odd creature, flying through a koi-nobori flag, the camera just zooming around her as she's flying in the air. At the end she reaches her destination, which for some reason is a massive elephant who unzips and out of his body comes flying a huge flock of glowing golden birds. Wonderful oneiric madness the likes of which I'd never seen before in anime, and I remember watching that op over and over. Before I even knew his name, I was in love with Yuasa.