This is probably old news to Simpson-nuts, but I had to share just in case somebody hasn't seen it. It seems the Simpsons are have been plugging lemonade in Japan for a while now. I haven't heard if it is indeed fortified with wasabe, but I think its a safe assumption knowing Japan.
If you want to watch the 30-second insane TV ads, look here: www.japander.com/japander/simpson.htm
They aren't as wacky as Mr. Sparkle, but the one with Homer and Bart comparing "bottle size" is pretty weird.